Freddie

Promising young classical violinist at Chicago's Milano Music Institute who has the misfortune to borrow the cursed violin of Romany fiddler Gyori Misklova, who was hanged in 1527. It gives him serious anger management issues after his roommate Vromik wins a violin competition instead of him. So Freddie (no last name given) kills Vromik and dies fleeing the crime.

From the "Curse of the Condemned Gypsy" story in comic book Baffling Mysteries #22 (September 1954).