I was watching this and wondering to myself, "How many of these people are genuine psychopaths...and how many just had a complete moment of madness?" I thought of that question when that bloke was on who had killed a police officer during a chase.
The bloke who was thrown in at 15 years of age was a fascinating man though. So articulate, calm and intelligent. I reckon he blames his own youthful naivety for where he is today...although of course, that isn't an excuse for him to not be there.