This music teacher and violinist refuses to teach at night, or even be out at night, in "The Strange Case of the Music Teacher" story in comic book Silver Streak Comics
#16 (November 1941). That's because he's a werewolf, of course! When one of his students drops by at exactly the wrong time, he mauls her to death. Then since he's already killed, he decides to go for four, since then the curse will be lifted. Hunh?
Superhero Daredevil (no, not that Daredevil) beats him up before he can murder the last victim.