In the weeks after her 2-year-old daughter Caylee's disappearance, Orlando mother Casey Anthony apparently collected photos of skulls and sketches of skeletons kissing, newly released police documents show.

Anthony, 22, is in jail on a first-degree murder charge and other offenses related to the death of her daughter.

Orange County Sheriff's Office released about 1,100 pages of interview reports and photos this week, part of an unusual strategy of periodically publicizing troves of evidence in the case against Anthony before the case goes to trial.

Click here for photos.

Caylee Anthony disappeared in early June but wasn't reported missing for about a month by her family. Police records show the images of skulls and skeletons were posted to Casey Anthony's online photo account on June 26.

The reason for Anthony's interest in the images wasn't clear. One skull image, labeled "apple of death," appears to be a photograph of a apple carved into a skull by an artist named Jaakko Ramala.

In December, a utility worker found the girl's skull, bones and other belongings in a plastic bag in a wooded area about a half-mile from the Anthonys' home.

Casey Anthony has said she last saw her daughter when she left her with a baby sitter — whom she says kidnapped the girl. Police have said that story is a lie and that no such baby sitter exists.

The documents also show that Anthony's then-boyfriend Anthony Lazzaro wore a wiretap in the police investigation when talking with her brother Lee Anthony. The recordings contradict the baby sitter story.

And in an Oct. 14 interview with police, detectives grill Casey Anthony on being evasive, according to the transcript.

"Do you have any interest in helping us?" an investigator asks her.

"I've had interest in helping law enforcement from the beginning," she replies. "Unfortunately, my hands were literally tied and I was put in a position where someone's trying to trick a confession out of me."

Later, she gave a tepid assertion of her innocence, the documents show.

"I try to keep an open mind when it comes to things, but if I'm innocent, that's, that's as far as it goes," Anthony says. "I'll take this as far as I need to prove my innocence, which I guess is my point in all this."

Among other revelations contained in the just-released paperwork is an expert's analysis that Caylee's remains had been in the woods for at least four months before they were found.

Last week, authorities publicized other case papers outlining that evidence found on or near Caylee's remains is a match to items collected at the house where she lived with her mother and grandparents.

Casey Anthony's murder trial is scheduled to begin Oct. 12. She has pleaded not guilty to the charges.

Click here for the documents and more from MyFOXOrlando.com.