In September 1931 Mad Dog Coll was hired by Salvatore Maranzano.Maranzano suspected Lucky Luciano of wanting to kill him and seize power for himself.Coll agreed to murder Luciano for a $25,000 payment in advance and a $25,000 payment on completion of the job. On September 10, 1931, Maranzano invited Luciano to visit his office. The plan was that Coll would turn up and kill Luciano. However, Luciano had received a tip-off about this plan,so he instead sent over a squad of his own hitmen who stabbed and shot Maranzano to death. According to the 1963 testimony of government witness Joseph Valachi, Coll arrived at the office to kill Luciano, only to meet Luciano's hitmen fleeing the scene. After learning from them that Maranzano was dead, Coll immediately left the building, $25,000 richer.


In 1926 the gang war between Al Capone and the north side gang then headed by Hymie Weiss there was a murder attempt on Weiss in broad daylight in the Loop.The retaliation for that failed attempt was probably the most spectacular failed attack on Al Capone of the whole era.