PHOENIX - Tucson police on Monday released recordings of 911 calls reporting the disappearance of Arizona 6-year-old Isabel Celis, who authorities said may have been snatched from her bed last month.

The high-profile search for hazel-eyed Isabel, who was reported missing on April 21 from the home she shared with her older brothers and both parents, drew national media attention as volunteers and police combed streets in her middle class Tucson neighborhood looking for her.

In the audio recording, Isabel's father, Sergio Celis, calmly tells the operator he wants to "to report a missing person. My little girl who's 6-years-old. I believe she was abducted from our house."

Dad asked to stay away from missing Tucson girl's brothers

The second 911 was placed by Isabel's mother, Rebecca. The audio of the call and a transcript were posted by NBC News affiliate in Tuscon, KVOA.com.

Rebecca: Hello?
Dispatcher: Hello ma'am are you the mom?
Rebecca: Yes.
Dispatcher: Okay, what is your name?
Rebecca: My name is Rebecca Celis. C-E-L-I-S
Dispatcher: Okay, anything else you remember she was wearing and her hair?
Rebecca: Her hair is in braids. It's in little ponytails. I made little ponytails on her head last night before she went to bed.

Dispatcher: So who, noticed her gone, your husband?

Rebecca: My husband, I went to work this morning at seven and um, I just, and I didn't even come and check on her, I should have come and checked on her.

Dispatcher: Okay, now you looked everywhere, under the beds, the closets, everything?
Rebecca: Yeah, I looked everywhere, I even looked _______— (inaudible) the windows out of our house. Somebody took the window out of our house.

Earlier on Monday, police said Isabel's two elder brothers had been placed in the sole care of their mother over concerns for their welfare.

More recordings at NBC News affiliate in Tuscon, KVOA.com

Tucson Police Chief Roberto Villasenor said the girl's father, Sergio Celis, had agreed not to have any contact with his sons, who are now in the care of their mother, Rebecca Celis.

Villasenor told reporters at a news conference that Sergio Celis had entered a voluntary agreement with Child Protective Services to stay away from the children, but declined to elaborate.

"Child Protective Services said that this would be the best scenario at this point," he said. The police chief did not give the boys' ages or names.

The girl's parents have told police Isabel was last seen when she was put to bed on the night of April 20. The family awoke the next morning to find her bed empty. Authorities said a window to the girl's ground-floor room was open, and a screen was missing.

Police have said they are treating the girl's disappearance as a "possible abduction," but have yet to rule anyone out as a suspect.

1,000 tips from the public
In a news release on Friday, Tucson police said they had been in contact with Child Protective Services after becoming aware of "information regarding the welfare of the older Celis children," but did not elaborate.

Several days after Isabel vanished, Sergio and Rebecca Celis made a tearful public appeal for her safe return, pleading with their daughter's presumed abductors to "tell us what you want."

After making their brief, anguished appeal, they hugged volunteers who helped in a search for their missing daughter, then walked away without fielding questions from the media.

During the search in recent weeks, Villasenor said police have received more than 1,000 tips from the public. Police have also canvassed homes in a 3-mile radius of the girl's home and searched the Celis house using sniffer dogs. 

Reuters contributed to this report.

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Updated 1:45 p.m. ET -- Firefighters trying to protect a historic mining town in northern Arizona were told to expect extreme conditions Tuesday, with temperatures in the 80s and gusts up to 35 mph that could fan an out-of-control wildfire. 

Crews are facing additional hazards as well: snakes and abandoned mining shafts.

Snakes were a problem at a past fire in the area, Karen Takai, spokeswoman for the fire team, told msnbc.com. No one has been bitten so far, she said, but "we know that could be an issue in this area."

Procedures call for any bitten firefighter to be taken to a local hospital for anti-venom.

As for mine shafts, "there are a lot ... that you don't see because of the amount of brush," she said. 

Add rugged terrain to the mix, she said, and conditions are "extremely difficult."

The National Weather Service also issued a "red flag warning" Tuesday for northern Arizona, southeast Nevada and southern Utah.

Burning south of Prescott, Ariz., in the Prescott National Forest, the wildfire that started Sunday has scorched an estimated 1,700 acres of ponderosa pine and chaparral, and threatens some 350 homes in Crown King.

Tourists who had been in the town left when a mandatory evacuation was ordered Sunday, while homeowners were allowed to stay as long as they remained on their property.

Some 300 fire personnel were already at the scene, and the first of 400 more are coming in Tuesday, Takai said. Six air tankers worked Monday to douse hot spots, and those flights will continue Tuesday.

Two buildings and one trailer have been destroyed, Prescott National Forest spokeswoman Debbie Maneely said.

The blaze, still at zero percent containment, started at a "structure" and was human-caused, she said.

Greg Flores, president of the Crown King Chamber of Commerce, said he helped a couple and their dog flee was the fire "fully engulfed" their home. 

"There were flames over 100 feet tall when we got up there," the Associated Press quoted him as saying.

Flores and his wife fled their home around 2 a.m. Monday when ash began raining down. They spent the night on the floor of his business and have since been able to return home. 

Flores added that the fire had turned a ridge black, destroying much of the forest there. 

Report: Busy fire season expected due to droughts

Crown King is located in the mountains more than 85 miles north of Phoenix, where the fire created a haze over the city on Monday.

The fire was one of several in Arizona since the weekend. They are the first major wildfires in Arizona this year, after a record 2011 season in which nearly 2,000 blazes scorched 1,500 square miles, according to the National Interagency Fire Center.

Another wildfire more than 120 miles northeast of Phoenix was five percent contained Monday evening.

On the San Carlos Apache Reservation, in eastern Arizona, a fire caused by lightning charred more than 1.7 square miles of ponderosa pine, juniper and oak.

A fire on the Fort Apache Reservation burned 575 acres of brush and grassland and threatened a fish hatchery.

The Associated Press and Reuters contributed to this report.

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A Glendale, Ariz., man who played the same numbers on six Powerball tickets didn't win the big jackpot but nabbed a $1 million second-place prize for each ticket for a total of $6 million, Arizona Lottery officials said this week. 

The winner, who elected to remain anonymous, claimed the prizes in three visits to the lottery's Phoenix office, according to a lottery statement.

The win came in the April 25 Powerball drawing. 

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There was one winning ticket in that April 25 drawing -- the $172.7 million prize went to a bunch of Philadelphia transit workers known as the SEPTA 48. 

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Matt York / AP

Maricopa County Sheriff Joe Arpaio.

Escalating a long-running battle with the outspoken sheriff of Maricopa County, Arizona, the Justice Department on Thursday sued him, his office and the county over civil rights issues involving racial profiling.

"The police are supposed to protect and serve our communities, not divide them. This is an abuse of power case," said Tom Perez, the head of the Justice Department's Civil Rights Division.

"If you look Latino, you are fair game," he said.

The county has refused to impose a program, proposed by the Obama administration, that would train deputies on how to make traffic stops without improperly targeting Latinos. "They're telling me how to run my organization. I'm not going to give up my authority to the federal government," Sheriff Joe Arpaio said Wednesday before the lawsuit was filed.

The Justice Department claims that since 2006, Maricopa County sheriff's officers unfairly have targeted Latinos for traffic stops -- unlawfully detaining, searching and arresting people, many of whom turn out to be US citizens or legal residents.

The lawsuit claims that the Sheriff's Office discriminates against jail inmates who have trouble speaking English. Commands are issued only in English, and when prisoners who don't understand them fail to comply, entire areas of a jail are put in lockdown, inciting "obvious hostility," Perez said.

He said Latino jail inmates are also forced to sign English-language legal documents in which they forfeit key legal protections.

A third category of improper conduct, the lawsuit says, involves retaliation by the Sheriff's Office against perceived critics, including judges, lawyers, and community leaders.

"They have been subject to actions designed to silence and punish them, including wrongful arrests and baseless lawsuits," Perez said.

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Guillermo Garcia

Araceli Mercado Sanchez and her husband, Pfc.Guillermo Garcia, with their daughter Alexia. Sanchez faced a deportation scare after being pulled over on a traffic stop while her husband was deployed overseas.

Updated at 3:05 p.m. ET Friday: A quick trip to the store to buy supplies for her 3-year-old daughter’s birthday party turned into a two-day nightmare for a U.S. Army soldier’s wife, who after being stopped for a minor traffic violation found herself threatened with deportation while her husband is stationed overseas.

Araceli Mercado Sanchez, 22, who has been in the U.S. illegally since she was a young child, was released on Thursday from an immigration jail in Eloy, Ariz. – but not before some harrowing moments for her and her husband, Pfc. Guillermo Garcia.

“This whole ordeal should not have ever happened. But I’m very happy the way things are turning out. At the very least I know my daughter will be properly taken care of and that my wife is going to be OK,” Garcia said in an email to msnbc.com after learning of his wife’s impending release.

Garcia, 22, had been waiting helplessly in Vilseck, Germany, where he is stationed with the 2nd Cavalry Regiment and awaiting imminent deployment, for word of his wife since Tuesday afternoon. That’s when she was stopped by a Mohave County sheriff’s deputy while driving from her home in Bullhead City to a store in neighboring Fort Mohave to pick up birthday items for their daughter, who was turning 3.

Sanchez was stopped for driving onto private property to avoid a traffic control device, according to sheriff’s records.  Her husband says he was told by family members that she made an illegal turn trying to get around a construction zone near the store.

After Sanchez told the officer she didn’t have a driver’s license or a Social Security number, she was taken into custody and her car was towed.  She was turned over to the Border Patrol, which then handed her over to U.S. Immigration and Customs Enforcement. ICE began legal proceedings to deport her, according to her lawyer, immigration attorney Richard Green of Huntington Beach, Calif.

But Ross Feinstein, an ICE spokesman in Washington, said his agency released Sanchez the same day that it received her, after verifying that she had no criminal history and was married to an active-duty U.S. service member. He said the agency "is committed to ensuring that its limited resources are focused on the removal of those who pose a threat to public safety such as criminal aliens and national security threats, as well as repeat immigration law violators, recent border entrants, and fugitives from immigration court." 

'Parole in place'
Green told msnbc.com that Sanchez should never have been turned over to immigration agents in the first place because she produced a military spouse ID card.

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Green said her detention runs counter to an immigration policy the Obama administration introduced in 2010 called “parole in place,” which allows illegal immigrants who are spouses, parents and children of American citizens serving in the military to complete the process of becoming legal residents without having to leave the U.S. An ICE memo at the time said the new approach was aimed at keeping military families intact and addressing Defense Department concerns about "soldier safety and readiness for duty."

Guillermo Garcia

Pfc. Guillermo Garcia was stationed in Germany when he found out his wife in Arizona had been turned over to immigration agents.

According to her lawyer, Sanchez came to the U.S. illegally at age 4 with her parents and has no criminal record. Garcia was also born in Mexico but is a U.S. citizen. The couple were married four years ago.

Garcia and the lawyer both said the couple was in the process of applying for legal status for Sanchez. Garcia said he enlisted in the military in part because he thought it might help his wife's case.

Garcia said he was unable to contact his wife during her detention despite numerous phone calls to the Eloy jail. Finally, a representative of the detention facility called back Thursday with the news he had been anxiously waiting for.

"She explained to me that they were not charging her with any crime and that her status was going to remain the same. They want me to continue working with my lawyer and wait on the response from the immigration packet we had submitted," Garcia said.

The incident left Garcia with a hint of bitterness.

“I feel outraged that my wife and daughter had to go through something like this. I am a United States Army infantry man legally married to my wife and she presented evidence to the officer that pulled her over to show just that and was still detained. It happened on my daughter's 3rd Birthday while on her way to pick up paper plates for the party that was planned for that afternoon,” Guillermo said in an email.

Trish Carter, a spokeswoman for the Mohave County Sheriff’s Office, said there was no indication in the police report that Sanchez showed her military spouse card. The deputy “followed standard procedure” in turning her over to the Border Patrol, Carter said.

Federal law allows local police to turn over illegal immigrants to the Border Patrol for removal proceedings. A provision of a new Arizona state law, SB 1070, would require officers to check the immigration status of people who are stopped for other reasons. That provision and several others have been put on hold while the U.S. Supreme Court decides whether they are constitutional.

Happy ending
Green described his client’s ordeal as “horrible,” “tragic” and “Kafkaesque.”

“I just think it’s crazy because we’ve got an immigration authority that seems to work really hard to deport more people this year than they did last, that operates in a very mechanical manner,” Green said.

“I just think it’s strange that I have got to contact them and ask them to release my client from custody and give them copies of the documents that their bosses in Washington have told them they should exercise prosecutorial discretion, when they should have exercised prosecutorial discretion and never taken her into custody in the first place.”

Video: Son arrested in federal agent's murder

Garcia said he’s relieved the matter has been resolved for now.

“I was able to speak with my daughter today after I learned that my wife was to be released. She kept crying to me, “Daddy I want mommy back!!! Please get her back!!!" and I told her that Daddy did it. That she would be back later today,” he said.

“If tomorrow is the day that I deploy, my heart and mind will be at ease and I can contribute more toward completing my mission, which is proudly serving and protecting my country."

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JT Ready for Sheriff via Facebook

J. T. Ready, a self-proclaimed neo-Nazi, was among five dead at a shooting at a home in Gilbert, Arizona. He was running for Pinal County Sheriff.

A leading neo-Nazi reportedly blamed by authorities in Arizona for killing two women, an Army veteran and a 16-month-old child in a suspected domestic incident was “cruel and controlling,” according to a former co-worker of one victim.

J.T. Ready, a former Marine, was running for Pinal County sheriff and was a member of the U.S. Border Guard and the Minuteman Project, according to The Arizona Republic, which described the groups as anti-illegal immigration organizations. The paper said he also belonged to the National Socialist Movement, a group with white-supremacist views.

The shootings took place at a house in Gilbert, Ariz., shortly after midday Wednesday. The Republic reported that authorities believe Ready killed himself after shooting the others.

Gilbert Police Sergeant Bill Balafas said officers were interviewing a witness to the shooting, which investigators believe stemmed from a "domestic situation," Reuters reported. 

Hugo Mederos, of Florida, told the Republic that the victims were his former wife, Lisa Mederos, 47, their daughter Amber Mederos, 23, her boyfriend Jim "Jambob" Hiott, 24, an Army veteran who served in Afghanistan, and Amber’s 16-month-old daughter Lily.

Hugo Mederos told the paper that his other daughter, Brittany Mederos, was present at the time, but was not hurt.

Matt York / AP

A police officer walks with a man who said he had a child inside of the home where five people were shot in Gilbert, Ariz., Wednesday.

"She was in the bedroom when she heard the gunshots," he added. "She heard everybody screaming. She heard the baby crying."

Amber Mederos was employed at a nearby Wendy's restaurant and Heather Morton, a former employee, told the Republic that Ready had met the Mederos sisters at the restaurant and then began a relationship with their mother.

Armored gunman, 4 people dead in Arizona shooting

Morton told the Republic that Ready moved in with Lisa Mederos, but Amber Mederos, her daughter and fiancé had left the family home because Ready was "cruel and controlling."

Morton said Ready had once said of Lily, who was half-Hispanic, “she's 50 percent ugly,” the paper reported. “That's how he described her," she added.

A Facebook page entitled "JT Ready for Sheriff" carried a message from the administrator noting unconfirmed reports that "a cartel assassination squad murdered JT Ready and several of his friends and family this afternoon in Gilbert Arizona," according to Reuters.

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J. T. Ready for Sheriff via Facebook

J. T. Ready, a self-proclaimed neo-Nazi, was among five dead at a shooting at a home in Gilbert, Arizona. He was running for Pinal County Sheriff.

Updated at 1:22 a.m. ET: A man equipped with several firearms and body armor killed four people, including a toddler, on Wednesday in Gilbert, Ariz., authorities told azcentral.com. They believe he then killed himself.  

J. T. Ready, a neo-Nazi and member of the Minutemen Civil Defense Corps, was among the dead, according to azcentral.com. It is unclear what role he played in the shootings. Unnamed police sources identified Ready as the gunman, azcentral.com reported.

Sergeant Bill Balafas told msnbc.com that he could not confirm whether Ready was even among the dead or if the crime was a murder-suicide. He said police are still identifying the dead.

"There were a few weapons in the house and we don't know if there was a gun battle or if it was a murder-suicide," Balafas said.

The shooting took place after 1 p.m.

At a briefing for reporters, Balafas said all the evidence points to the shooting being related to domestic violence. He didn't elaborate.

Two handguns and a shotgun were recovered from the crime scene. Balafas said investigators had obtained a search warrant Wednesday evening and a bomb squad was sweeping the house for precautionary reasons.

Authorities said a search of the home and positive identification of the bodies were pending as police wait for a federal agency to remove unknown chemicals and munitions from inside and outside of the home for officer safety.

FBI spokesman Manuel Johnson said federal agents were at the scene "providing personnel and technical assistance" to Gilbert police, but that the police department was the lead agency.

Down the street from where the shooting took place, neighbor Lieselotte Senge said she heard a loud boom around 1 p.m. and stepped out onto her stoop to see where it came from.

“All of a sudden I saw all of the police cars,” Senge told msnbc.com. They were in the garage of a woman who Senge said had a daughter and infant granddaughter.

On arrival, first responders believed the toddler, who was between one and 2-years-old, showed signs of life. She was transported to a children’s hospital but was pronounced dead on arrival, Balafas said.

Law enforcement agents had been nervous about Ready, according to a 2010 story by the Associated Press. He led a militia group that focused on nabbing undocumented immigrants and drug traffickers along the Mexican border. He was also heavily armed and a self-proclaimed neo-Nazi.

“These are explicit Nazis,” Mark Potok of the Southern Poverty Law Center’s Intelligence Project told the AP. “These are people who wear swastikas on their sleeves.”

In Gilbert, a city of 208,000 southeast of Phoenix, neighbor Senge watched as school children had been escorted to their homes by police officers. The shooting had taken place three doors down from her house, at a bend in the road where Tumbleweed Road becomes Monteray Street.

She said it’s a nice neighborhood of single-family homes where neighbors, apart from the occasional wave, mostly keep to themselves.

This report contains material from The Associated Press and Reuters.

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The first major Texas wildfire of the season was threatening a group of rustic cabins in the Davis Mountains, NBC News reported.

Firefighters were battling the blaze, which covers 20,000 acres, in an area that was struck by uncontrolled burning exactly a year ago, according to NBCDWF.com.

The blaze comes as federal authorities and forecasters were anticipating an active, though not especially fierce, season.

Former volunteer fire chief Kelly Bryan told NBCDWF.com that no injuries or structural losses were reported in the fires at the Davis Mountain Resort. The area is some 175 miles southeast of El Paso.

Texas Forest Service spokeswoman April Saginor told the news channel that a 10,000-acre fire was burning uncontained Monday night at the Livermore Ranch, within 1½ miles of the resort.

Saginor said firefighters had a 9,900-acre blaze at Spring Mountain 60 percent contained Monday night.

The forest service said lightning strikes sparked the fires.

Four large uncontained fires, including the two Texas fires, were raging as of Tuesday, according to the National Interagency Fire Agency.

A new 500-acre fire was burning 11 miles south of Bowls in Arizona in the Apache Pass area. That fire was not  threatening any structures, according to KVOA-TV. It was believed to be a human-caused fire.

In Florida, a nearly 35,000-acre fire near the county line with Georgia was reported to be 80 percent contained.

A wildfire on Hawaii’s island of Oahu, on the leeward coast, has torched 200 acres of a wildlife reserve. The fire began on Monday night in the Makua Keaau Forest Reserve near Keaau Beach Park. Firefighters were using helicopters to fight the blaze in rough terrain, KITV-TV reported.

'Perfect recipe' for wildfires as season starts early 

Meanwhile, the federal government was bracing for an active wildfire season.

"We are ready to meet the challenge," Agriculture Secretary Tom Vilsack said at a news conference Thursday ahead of the fire season. "Our concern does not stop at the border of federal lands, but rather a strategy that is an all-lands approach for safety and wildfire management."

More than 15,000 firefighters will be available this year, officials said, including permanent and seasonal federal and state employees, crews from tribal and local governments, contract crews and temporary hires.

An unusually dry winter in much of the southwestern U.S. is expected to continue the “severe to exceptional drought from last year across most of western Texas, New Mexico and Arizona,” according to the national wildland fire outlook.

Above normal fire potential was expected across southwestern New Mexico and the southeastern third of Arizona through May.

Still, the broader wildfire forecast for parts of Texas was expected to be normal through the fire season, which runs through Aug. 31, according to the National Interagency Fire Center. Parts of east Texas, as well as Arkansas, Louisiana and Mississippi, were expected to see below-normal fire potential, the forecast said.

In southern and central California, recent rains were expected to lead to a normal start to the fire season, the forecast said, with significant fire potential in interior areas increasing as the season goes along because rainfall that was 50 percent to 70 percent of normal.

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The girl was last seen around 11 p.m. on April 20 as she was getting ready for bed. Her father reported her missing the next morning, when he noticed Isabel was not in her bedroom at 8 a.m. and saw the window was open and the screen had been removed.

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Arizona lawmakers appear close to sending to Gov. Jan Brewer a tea party-backed bill that proponents say would stop a United Nations takeover conspiracy but that critics claim could end state and cities’ pollution-fighting efforts and even dismantle the state unemployment office.

A final legislative vote is expected Monday on a bill that would outlaw government support of any of the 27 principles contained in the 1992 United Nations Rio Declaration on Environment and Development, also sometimes referred to as Agenda 21.

Senate Bill 1507 was passed by the state Senate last month and received an initial House affirmation Wednesday. It is sponsored by state Sen. Judy Burges, R-Sun City West, who also sponsored a state birther bill that Brewer vetoed last year.

"The bill is designed to protect the rights of Arizona citizens and prevent encroachment on those rights by international institutions," Burges told msnbc.com in an email. "We have three branches of government and when one branch preempts the process through executive orders, the balance of power is lost in the process. It is that simple -- no more, no less."

At a March 15 hearing on the bill, Burges said an executive order signed by then-President Bill Clinton in 1993 started the implementation of Agenda 21 after the Senate refused to pass a treaty ratifying it.

"Any way you want to describe it, Agenda 21 is a direct attack on the middle class and working poor" through "social engineering of our citizens" in "every aspect" of their lives," she told the hearing. 

But House Minority Leader Chad Campbell, D-Phoenix, has a different view.

“It’s the most poorly crafted bill in this state,” Campbell told msnbc.com. “It’s so broad and overreaching, we’re not sure what it could impact.”

Among the U.N. declaration’s non-binding principles are calls for sustainable development, environmental protection, eradicating poverty, eliminating unsustainable production and consumption patterns, economic growth and the participation of women in government decisions.

“We wouldn’t be able to use CFL light bulbs in state buildings because that would be considered energy efficiency,” Campbell said.

Campbell also said that the state’s Economic Security Department, which handles unemployment and welfare benefits, could be outlawed because it has to do with eradicating poverty.

Also, Arizona universities have sustainability programs that could be banned if the bill becomes law, Campbell warned.

Arizona State University has a School of Sustainability, Northern Arizona University offers a master's in sustainable communities, and the University of Arizona has an environment and sustainability portal.

Watch US News videos on msnbc.com

Brewer, who last spring vetoed Burges' bill to require presidential candidates to prove their U.S. citizenship, typically does not comment on legislation until it reaches her desk, her spokesperson told msnbc.com Thursday.

About the Rio declaration, SB1507 says “the United Nations has enlisted the support of numerous independent, shadow organizations to surreptitiously implement this agenda around the world.”

Rep. Terri Proud, R-Tucson, told supporters in an email that the U.N. declaration “will take away our rights as Americans by allowing the United Nations to mandate laws on our soil,” the AzCapitolTimes.com reported. “It’s very real and it is happening.”

The Times also reported that during House debate Wednesday, Rep. Jack Harper, R-Surprise, said the declaration is connected to the “occult” of sustainability.

"The tea party and conspiracy theorists run the state now, Campbell told msnbc.com.

See video from the March 15 House Judiciary committee meeting on SB1507 here.

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The parents of a 6-year-old girl missing in Arizona spoke publicly for the first time since their daughter disappeared nearly a week ago, as hundreds of leads but no major breaks in the case came in.

"We do not want the focus to be taken off Isabel by us being in front of the cameras or by the media. We are here today to plea for a safe return of our baby girl Isabel." Becky Celis said Wednesday.

Surrounded by volunteers wearing "Bring Isa Home" T-shirts, Becky and Sergio Celis spoke in both English and Spanish in their eastside Tucson, Ariz., neighborhood where their daughter disappeared Friday night, NBC affiliate KVOA.com reported.

"We are cooperating to the fullest extent with the investigation," Sergio Celis said. "We are increasing the reward. Just please, please, to the person or persons who have Isabel: Tell us your demands. Tell us what you want. We will do anything for her. We are looking - we are looking for you, Isa. We love, and we miss you so much. We will never give up. We will never give up looking for you."

Investigators have received 300 leads in the girl's disappearance, NBC's Miguel Almaguer reported Thursday. But with no big break in the case, they urged Isabel's parents to go public. She was reported missing Saturday morning.

No suspects have been arrested in the case. Police say Isabel's parents are working with investigators.

Full coverage from KVOA.com on Isabel Celis

The parents have said Isabel, who has two older brothers, was last seen when she was put to bed on Friday night. The family awoke Saturday morning to find the hazel-eyed girl's bed empty, they told police.

Screen missing
Authorities say a window to the girl's ground-floor room was open, and a screen was missing.

Police have said they are treating the girl's disappearance as a "possible abduction" but have yet to rule anyone in or out as a suspect.

Fliers and posters with photos of Isabel's smiling face, some of her wearing a blue bow in her light brown hair, were plastered all over town. The Pima County Attorney's Office posted an $8,000 reward, most of it from private donations, for information leading to an arrest in the case.

The search widened on Tuesday to washes surrounding the middle-class urban neighborhood. Police investigators have been paired with FBI agents to knock on every door within a three-mile radius of the family's home, and all local trash companies have been contacted, said Tucson police Chief Roberto Villasenor.

The family was given the go-ahead to return to their modest single-story house on Wednesday morning, after FBI behavioral analysts had examined the home. The entire block remained cordoned off with police tape, and squad cars were posted at each end. Villasenor reiterated that the search continues.

"All we think about is bringing her back safely," he said.

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Investigators also have collected surveillance video from nearby businesses in hopes that some clues might have been caught on camera. A landfill and refuse-transfer station that serve the area have been secured and will be searched, he said.

"We're at about 300 tips and leads," and all will be pursued, Villasenor said. He added: "We are now concentrating our search on ... some focal points where we're hoping we'll have more success."

It was not clear whether the FBI's behavioral analysis team had spotted anything of interest in the family's home that two physical searches of the dwelling, including a sweep with specially trained dogs, had overlooked.

The behavioral analysts planned to interview family members and other witnesses, and Villasenor said the parents were cooperating with investigators. "Obviously (these) are times of emotional distress for them," he said.

This article includes reporting by NBC station KVOA in Tucson and Reuters.

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Editor's note: In an earlier version of this story, msnbc.com erroneously described a portion of the bill under review. The section in question requires that  police try to determine the immigration status of people whom they arrest or stop if there's reasonable suspicion that person is in the country illegally.

Updated 1:35 p.m. ET: The U.S. Supreme Court indicated Wednesday it appears ready to uphold one of the most controversial parts of Arizona's immigration law: a requirement that police officers check the immigration status of people they think are in the country illegally.

Wading into a highly divisive issue in the middle of a presidential campaign year, conservative and liberal justices who heard oral arguments on Wednesday morning seemed to find no strong objection to that section of the law.

Justice Anthony Kennedy, who casts the deciding vote in many cases, referred to the "social and economic disruption'' that states endure as a result of a flood of illegal immigrants and suggested that states such as Arizona have authority to act.

"You can see it's not selling very well," Justice Sonia Sotomayor, one of the more liberal-leaning judges, told Obama administration Solicitor General Donald Verrilli, referring to his arguments that the law would lead to harassment of citizens.

Arizona appeared to have a tougher time defending two other provisions of the law that are now blocked: making it a state crime to have no federal immigration papers and making it a state crime for an illegal immigrant to look for work. Neither is currently a federal crime.

The court session ran 20 minutes beyond the scheduled hour, with Verrilli arguing the case for the Obama administration and Washington attorney Paul Clement, who served as President George W. Bush’s solicitor general from 2005 to 2008, representing  Arizona and its Republican governor, Jan Brewer.

Chief Justice John Roberts dismissed the administration's arguments that the Arizona law conflicted with the federal system, saying Arizona’s measure is "an effort to help you enforce federal law.''
   
The four conservative justices, Roberts, Kennedy, Antonin Scalia and Samuel Alito, all asked tough questions of Verrilli. Fellow conservative Justice Clarence Thomas did not ask any questions, but based on past votes is expected to support the Arizona law.

Leonida Martinez, left, from Phoenix, Ariz., and others, take part in a demonstration in front of the Supreme Court in Washington, D.C., Wednesday, as the court weighs Arizona's immigration law.

Justice Elena Kagan recused herself from the case because she had previously worked on it while serving as the solicitor general for Obama.

Verrilli tried to persuade the justices that they should view the law in its entirety and said it was inconsistent with federal immigration policy. He said the records check would allow the state to "engage effectively in mass incarceration" of undocumented  immigrants.

Supreme Court to hear Arizona immigration case: Who wins, loses?
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But Roberts said the state merely wants to notify federal authorities it has someone in custody who may be in the U.S. illegally. "It seems to me that the federal government just doesn't want to know who's here illegally and who's not," Roberts said.

The Obama administration argues that only the federal government, not states, has the right to set immigration policy.  It says Arizona cannot impose immigration laws that conflict with federal laws.

Arizona says it enacted SB 1070 because the federal government has failed to stop an influx of illegal immigrants from Mexico. It says its law doesn’t conflict with federal statute, and in fact does specifically what the federal law is supposed to do.

The legislation was signed into law by Brewer in April 2010 but key parts of the law were put on hold by lower courts pending action by the Supreme Court on the challenge from the Obama administration. Arizona’s law has inspired similar laws in other states.
Brewer was on hand for the final argument of the Supreme Court's term.

Can an illegal immigrant become a lawyer?

Outside the Supreme Court, supporters and opponents of the law held their own court, giving speeches, holding banners and singing songs. At one point, supporters of the law started singing, “The Star-Spangled Banner,” The Wall Street Journal reported.  Opponents joined in, and both groups sang the end of the national anthem together, the Journal reported.

The Supreme Court is expected to render a decision before the end of June.

It’s the second high-profile case involving the Obama administration to be argued this year before the Supreme Court. Last month, the court heard oral arguments on a constitutional challenge to Obama’s sweeping health care law.

One of the main architects of the Arizona law, former Republican state Sen. Russell Pearce, has described the unabated flow of illegal aliens into the country as one of the “greatest threats to our nation.”

“We have a national crisis, and yet we continue to ignore it," Pearce, who was removed from office last year in a recall election, testified on Tuesday at a U.S. Senate hearing.

NBC's Pete Williams and The Associated Press and Reuters contributed to this report.

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