This is based on the book by , starring Tony Curtis as Albert DeSalvo (The Boston Strangler). I have never read the book, but there were a lot of inaccuracies in the film compared to the real life case, however, l enjoyed it anyway. There were a lot of split screen shots and reflections in glass, obviously to enforce the split personality the film portrays DeSalvo as having. Curtis was excellent, as was Henry Fonda, playing the chief detective John S Bottomly. It was dated and old looking, with lots of false leads (which is fine by me), but l would have preferred it if it had stuck to the known facts of the case, including it's inconclusive element, but that's the movies for you.
Nearly forgot, l also thought it gave Peter Hurkos way too much credibility, portraying him as unnervingly accurate, although he was still wrong. Balderdash l say!