She taped the calls with the FBI's help. It's because of her gaining his confidence that they got him on the child




. Unfortunately they didn't see any evidence that he harmed any child, so child




was all they charged him with and he fled the country.
I don't see this rancor toward Wendy Hutchens, assuming she is somehow unbalanced. She was a guest of Larry King, Paula Zahn, and Nancy Grace, all of whom felt she was believable. The Sonoma police dept. issued a press release confirming she worked for them to get Karr to talk about his crimes against children.
If she wrote the profile it was with the help of the investigators, and it was based on his own taped words. This is not a crackpot loon trying to glorify herself. This is a look into the mind of a dangerous criminal. People are shooting the messenger.
She met Karr because she knew Richard Davis (killer of Polly Klaas) from childhood, lived on the same street, and wrote to him asking if he knew about the death of someone else she knew. Because at the same time Karr was writing to Richard Davis, he put her in touch with Karr through some website. She explained all this on LKL today, there is probably a transcript on line if you want more exact details. Then when she began seeing how disturbed Karr was she went to the police, and from then on taped his conversations for them.