I will repost what I said on one of Cassandra's threads:
They did have an interesting interview with a forensic phschologist on MSNBC just after the body was found. (I wish they had transcripts) but she said that one pedophile will become emboldened by hearing about other pedophile obductions and murders since just the act of being sexually engaged with a child sets off their fantasy world. They become worked up and act out.