“After 18 years of solitary confinement with death breathing down my neck, some things don’t matter as much as they used to. I’ll still be strapped to that gurney and have my body pumped full of poison.” 

In 1998, Christina Muse was assaulted with a stun gun, beaten, locked in a cupboard, and drowned. Her body was found stuffed in a barrel in a ditch four months later. Troy Clark was sent to death row for the murder, but has always denied it. Is there any merit to his claims? Zoe Hines and Ned Parker investigate his Letters From A Killer.