48 Hours S25 E14 Screenplay for Murder: The Diary of a “Dexter” Wannabe

When Gilles Tetreault arranged to meet a woman he met on an online dating site, he had no idea of the horror that would unfold. Tetreault says he came face-to-face with a madman who had set a trap to kill him. Tetreault was attacked and barely escaped with his life. Johnny Altinger answered a similar online dating ad and disappeared without a trace. Was there really a crime, or was this an elaborate setup for a screenplay for murder? Troy Roberts reports.