Wednesday, police in California revealed that they noticed five years ago that Karr had a fascination with the JonBenet slaying, and told Boulder police at that time what they knew.
Sonoma County, Calif., police say Karr was also focused on several other cases involving children, including 1993's highly publicized abduction and murder of Polly Klaas of Petaluma, Calif.
Also Wednesday, an ex-wife of Karr, who married him when she was just 13 years old, said in an ABC "Good Morning America" interview that he used to tell her about fantasies he had about little girls. Quientana Ray also alleges that she was drugged and things were done to her without her knowledge.
Her parents, appearing on the same broadcast, said they discovered letters Karr wrote to their daughter that were signed "S.B.T.C." — the same initials found on a ransom note left in the Ramseys' home on the day JonBenet was killed.
They did not show the letters during the interview and it is not clear whether they still have them.
Karr's family is also in the spotlight – after hiring an actor, author and producer to represent them in any media deals and use the cash to help them find a top attorney to represent Karr.
Karr told reporters in Thailand last week that he was with JonBenet when she died and that it was an accident. His family contends he was with them in Georgia at the time of the Colorado killing.
Police investigating the JonBenet murder have yet to reveal the nature of the evidence that caused them to charge Karr with felony murder, first-degree kidnapping, second-degree kidnapping and sexual assault on a child.
Last week was the first time the public first heard his name as a suspect in the JonBenet killing. Within hours, it came out that police had been watching him in Thailand for months – and arrested him, according to one report, when they became worried he might pose a danger to children in that country.
It now turns out that Karr's name surfaced a lot earlier: in 2001, when Sonoma County detectives investigating Karr as part of a child pornography case phoned police in Colorado – to tell them of Karr's "apparent fascination" with the JonBenet Ramsey murder.
A statement released Wednesday by the Sonoma County sheriff's office says Karr did not appear then to have any special knowledge of the Ramsey murder.
Karr remains in custody in Los Angeles, where he was transported after his arrest in Thailand. He's awaitingto face murder, kidnapping and sexual assault charges in the Ramsey case. That might not happen until early next week, according to attorney Jamie Harmon, who is representing Karr along with Patience Van Zandt, who also represented him in 2001 when he was accused of possession of child pornography.
Larry Garrison, the actor, author and producer hired by Karr's father and brother to represent the family in any media deals - says that while the family's film and book rights are secured, no money has changed hands yet.
"They proclaim his innocence," says Garrison. "They feel he was not there at the time, that some of the statements made by the press are absurd."
The Karr family, he says, "are spiritually coming from the right place... They're not looking for money for themselves. They're looking to support John's boys' college education and to make sure all legal fees are covered."