M (1931)

A very effective early serial killer movie (the first, says IMDb trivia). Although I usually like stories focusing on the psyche of the insane, I very much liked the focus this movie had on how it affected the town. The early scenes of paranoid citizens jumping to accuse every man who had an encounter with a child showed how much these murders had affected the town. I certainly liked this better than Night of the Hunter, which I've heard it compared to (I found that one unconvincing). Glad I finally watched it. 4 stars.