The Thing on the Doorstep

"It is true that I have sent six bullets through the head of my best friend, and yet I hope to shew by this statement that I am not his murderer."

The year is 1933, and Edward Derby's best friend, Daniel Upton, visits him in Arkham Sanitorium and shoots him dead to the horror of the guards. It's an open and shut case - or is it? What happened to this lifelong friendship for it to end this way? Who exactly was Edward Derby at the end of his life? And, most importantly, will his murder be enou...