Vincent “Mad Dog” Coll was an Irish-American mob hitman in the 1920s and early 1930s in New York City.

Coll first joined up with Dutch Schultz as an assassin, but quickly became unhappy with Schultz not promoting him to be an equal partner. By January 1930, Coll had formed his own gang and was engaged in a shooting war with Schultz. To finance his new gang, Coll kidnapped rival gangsters and held them for ransom.

It was said that both Dutch Schultz and Owney Madden had put a $50,000 bounty on Vincent Coll’s head. At one point, Schultz had actually walked into a Bronx police station and offered “a house in Westchester” to whoever killed Coll.