Murder Points a Finger by David Alexander

Paperback. Condition: Good+. 1955. Bantam. 

A COP-KILLER WAS LOOSE

The Cop: "Just find Ellison." Inspector Sanson said, "-- and leave me alone with him in a locked room --"

The Girl: "He used to make me scream and cry when he tore the wings of butterflies, and now -- and now —-"

The Killer: "I have to kill her. I have to kill her now because of you. I’ll have to kill you too, of course."

A tense, unique drama and challenging mystery.