I can't attest to the accuracy of it, but the book In Broad Daylight, won an Edgar Award for True Crime, IIRC and is very entertaining. I've never seen a copy of the movie that wasn't effed up. A friend of mine taped it off the TV years ago and I've got a VHS copy that's not very good. Seemed like Dennehy and his co-stars did about as good of a job as they could have in a TV movie. It really needed more time to adequately tell the story. IIRC, the movie In Broad Daylight, was the second movie about it and was much more accurate and less preachy about the "vigilante" angle than the first one, which starred David Graf (Tackleberry from Police Academy), was out three years prior.