Part of the case against 37-year-old Joshua Lelevier is evidence that suggests he tried to fake things to shift blame for his stepdaughter's death.
Now a 911 recording puts a voice to his claim that someone attacked him.
The voice is Lelevier's wife, Jessica.
The autopsy on 13-year-old Jayden Glomb says she was strangled with something like a thin cord or wire.
Eleven days after her body was found, but before he was arrested for her death, Joshua Lelevier said someone tried to strangle him as he was alone in his backyard.
"I don't know if I have the right number, but my husband just came out and said somebody attacked him," we hear Jessica Lelevier say in the 911 call.
Once deputies arrived, they found his story so strange they made a point of telling Tucson Police Detectives about it.
Before Deputies arrived, Jessica was not able to give 911 many specifics.
911 Operator: "Does he know who did this?"Jessica Lelevier: "He says he didn't see anybody. Someone just grabbed him from behind."
The operator continues to try to get more to work with.
911 Operator: "Are you able to ask him if the person ran off?"Jessica Lelevier: "Yes, the guy ran off. He said he thinks he went over the back wall."
Deputies said saw a small mark on Joshua's neck, but it did not look like it came from a strangulation attempt. They did find a loop of electrical cord dropped in the home's yard.
In other parts of their case, detectives describe what they regard as faked evidence , include a suicide note in Jayden Glomb's computer, but investigators say that note was made at a time when Joshua was the only one with access to that computer.
Other recent revelations include detectives describing peepholes cut from Joshua's den to a bathroom Jayden Glomb used, and an image secretly taken of her partially dressed in that bathroom.