John Mark Karr?
More like John Mark Making the Whole Thing Up
And, a little less than a week ago, your friends here at TLBR had that POS JMK pegged as FOS. (see the thread "Tuesday Night Turtles")
So, feel free to take "child-killer" off JMK's criminal CV. But be sure to leave "delusional, attention-starved, attention-craving, pedophile." That much we all can prove, without any DNA test.