The Lenox Avenue Gang
The Lenox Avenue Gang was started sometime during the early 1900s by Gyp the Blood as an independent group of around twenty members, consisting mostly of pickpockets and burglars, under Jack Zelig's Eastman Gang. Mainly operating around 125th Street, the gang generally committed muggings and robberies although they were occasionally hired out for murder by Zelig.
While successful in its early years, the gangs downfall began when they were hired to murder gambler Herman "Beansie" Rosenthal, a suspected police informant. Horowitz, along with Seidenshner, Rosenberg, and Cirofisi, drove to the Metropole Hotel on July 16, 1912 and, calling out to Rosenthal, shot him several times as he appeared onto the street, before fleeing the scene. The gangsters, seen by dozens of witnesses, were soon arrested however and, after being questioned, it was admitted that they were hired out by NYPD Lt. Charles Becker who had ordered Rosenthal's death after he had informed on Becker.
Charged with the murder of Rosenthal, Gyp the Blood, Jacob Seidenshner, Louis Rosenberg, and Francesco Cirofesi were sentenced to the electric chair and executed for the murder of Rosenthal in 1914. With the loss of their leaders, the gang disbanded entirely within several months.