By Marcelino Benito
Tucson, AZ (KGUN/CNN) - There are new details now about the search for a missing Arizona girl.
Police have released hundreds of pages of records from their month-long search for six-year-old Isabel Celis.
It's the sound of new details in the Isabel Celis case.
Every page highlights a clue Tucson police followed in their search for Isabel.
They've searched everything from lakes to trash cans across the city. Throughout the search they found things like dead animals in bags covered with maggots, rotting rattlesnake carcasses, even little girls' shoes collected into evidence at Highland Park.
But none of it has led them to Isabel.
We learned more about the police investigation into the Celis family. All family members have been swabbed for DNA. Rebecca and Sergio submitted blood samples.
Police also questioned Rebecca about her other children and whether they could hurt Isabel. She says there's no way.
Sergio tells police he fell asleep on the couch in the family room before joining Rebecca in bed at 5 a.m. the morning she disappeared.
He tells police the window was closed the last time he saw Isabel.
Authorities have also collected footprints around several key locations. Apparent blood was also found on the floor of an unspecified residence.
Police also checked for semen samples.
The reports reveal a thorough investigation, one where police have looked into every lead that's come in, no matter how far-fetched.
Police reveal one call from a pay phone, where the caller claims to have Isabel, and threatens to kill her if police don't get there in 10 minutes.
It turned out to be a prank call.
In another instance two men at a bar confess to playing a role in Isabel's disappearance, only to recant when they sobered up the next morning.
At day 34, these documents show police have covered their bases, even following leads from several so-called psychics that have called in.
Isabel was last seen April 20th when she was put to bed.
Authorities have called her disappearance suspicious, but haven't named any suspects in the case.