Missing Arizona Girl Isabel Celis' Bedroom Had Possible Blood Stains

May 25, 2012— -- New documents released in the case of missing 6-year-old Isabel Celis reveal that Arizona police found reddish-brown stains in the girl's bedroom and on household items during the investigation into her disappearance.

More than 550 pages of police documents were released in the case, which began when Celis' father called 911 on the morning of April 21, 2012, and reported her missing. He said he believed the girl had been abducted during the night, and when he went to check on her in the morning, she was gone.

The police reports released Thursday do not name a specific suspect or show any possible theories about what happened to the girl, but detail evidence found around the crime scene. One report shows that detectives saw "apparent blood on the floor" of Celis' bedroom, and took into custody a white hat and vinyl shower curtain that had "dark red-brown or brown stains" and were found in a car located outside the family's home.

In another report, detectives noted that one person interviewed during the investigation "said that a guy who was staying with the family owed someone a lot of money and that's why she was taken."

Another witness interview points the finger at Sergio Celis, the girl's father.

"(The man) went on to say that something didn't seem right about what was going on and alluded that he believed that the father was involved in some way," the police report said.

Sergio Celis, who reported Isabel missing, told police that he had fallen asleep on the couch on the night Isabel was taken, and that he had woken up and moved back to his bed around 5 a.m., just two hours before his wife awoke and left for work. She did not check on the little girl before she left for work, according to police.

The girl's father has come under scrutiny before, as child protective services in Tucson barred Sergio from having contact with his two sons, Isabel's brothers, during the investigation.

"A voluntary agreement was reached between Child Protective Services and the parents to restrict access or, voluntarily, for Sergio to give some space and distance away from the two older children," Tucson Police Chief Roberto Villasenor said.

Arizona's CPS also revealed that they had visited the family's home in December, though they would not disclose details of the visit.

"It's tough because we're already under a lot of stress because we don't have Isabel here, so to have more thrown on us, but we're strong and we'll be okay, we'll survive it. We just want her back," Becky Celis, the girl's mother, said.

Alyssa Newcomb contributed to this report.