Coll's killers were never identified. Dutch Schultz attorney Dixie Davis later claimed that gangster Bo Weinberg was the getaway driver of the limousine. Another suspect was one of Coll's own men, Edward Popke aka Fats McCarthy. The submachine gun that killed Coll was found a year later in the possession of a Hell's Kitchen gunman named "Tough" Tommy Protheroe, who used it during a 1933 saloon killing. On May 16, 1935, Protheroe and his girlfriend Elizabeth Connors were shot and killed by unknown triggermen in Queens.