Rampage

A killer so savage and sly that the brutal frenzy of his crimes makes an unassailable insanity defense—such is the opponent facing Tony Fraser, a young D.A. willing to risk anything, everything, for a sentence of death. Plotted against by court psychiatrists, tormented by vanishing evidence and fugitive witnesses, his own wife a target, Fraser finds himself checkmated by the accused until he seizes an opportunity to go beyond the letter of the law.

Adapted into a motion picture by director William Friedkin (The Exorcist, The French Connection, and Killer Joe).