Young killer fixated with Satan had an alarming drug habit

LUKE MITCHELL was no ordinary teenager. He was the cold, calculating killer who brutally murdered his girlfriend Jodi Jones, then calmly helped her family search for her.

Mitchell came from a broken home his parents Corinne and Philip are thought to have split up in 1999.

Like thousands of other troubled teenagers around the world, he was taken in by the brooding Goth culture and it is no surprise that he is a fan of US shock-rocker Marilyn Manson and tragic Nirvana singer Kurt Cobain.