Lenox Avenue Gang

Lenox Avenue Gang

Louis Rosenberg, “Whitey Lewis,” Francesco Cirofici and Harry Horowitz after their 1912 murder convictions; the newspaper called Whitey Lewis Frank Muller, while the court captioned him Jacob Seidenshner
Also Known As	Gyp the Blood Gang Lenox Avenue gunmen
Origins
Founding Location	Manhattan, New York City
Territory	Harlem Lower and Midtown Manhattan (criminal activity and associations)
Profile
Structure	Small gang or gunmen's crew; complete roster and hierarchy uncertain
Ethnicity	Predominantly Jewish-American, with Italian and other associates
Activities	Robbery and theft Gambling-related enforcement Assault Murder-for-hire and hired violence
Politics
Leader	Harry “Gyp the Blood” Horowitz (conventional attribution)
Notable Members	Louis “Lefty Louie” Rosenberg Jacob Seidenschner (“Whitey Lewis”; also reported as Frank Muller) Francesco “Dago Frank” Cirofici
Activity
Status	Destroyed by the Rosenthal murder convictions and 1914 executions
Years Active	c. late 1900s–1912 (exact formation date uncertain)

The Lenox Avenue Gang was a small, predominantly Jewish-American New York gang or gunmen's crew conventionally associated with Harry “Gyp the Blood” Horowitz. It is chiefly documented through the 1912 murder of gambler Herman Rosenthal and the convictions of Horowitz, Louis Rosenberg, Jacob Seidenschner and Francesco Cirofici.

The gang was not exclusively Jewish: Cirofici was Italian-American. The surviving court record firmly establishes the four men's participation in the Rosenthal case but does not provide a complete Lenox Avenue membership chart or formal hierarchy.

Name and organization

“Lenox Avenue Gang” is a conventional historical and journalistic title. Later accounts place the group in Harlem and portray Horowitz as its leader. A 2014 New York Times historical column likewise called Horowitz leader of the feared Lenox Avenue Gang.

Contemporary legal decisions more often called the men “gunmen” than members of a formally named organization. The page therefore uses “gang or gunmen's crew” rather than projecting a corporate structure onto every relationship.

The familiar spelling “Whitey Lewis” presents an identity problem. The New York Court of Appeals captioned the defendant Jacob Seidenshner, while contemporary newspapers and later accounts also used Frank Muller or Müller. These names are retained as variants rather than silently treated as different gang members.

Rosenthal murder

Herman Rosenthal operated a gambling house and publicly accused New York Police Department lieutenant Charles Becker of holding a financial interest in it. Rosenthal was shot outside the Hotel Metropole near Times Square on July 16, 1912.

The New York Court of Appeals identified four men concerned in the fatal shooting:

• Jacob Seidenshner, called “Whitey Lewis”;
• Frank Cirofici, called “Dago Frank”;
• Louis Rosenberg, called “Lefty Louie”;
• Harry Horowitz, called “Gyp the Blood.”

The four were hired through gamblers Jack Rose, Bridgie Webber and Harry Vallon. Rose, Webber and Vallon became cooperating witnesses. Their role in arranging the killing does not by itself establish that they were Lenox Avenue Gang members.

William Shapiro drove the automobile used in the plot and testified for the prosecution. His participation as a driver and witness likewise should not be converted automatically into permanent gang membership.

Trials and executions

Horowitz, Rosenberg, Seidenshner and Cirofici were convicted of Rosenthal's murder. The New-York Tribune published their portraits after the verdict, using Frank Muller for “Whitey Lewis.” The Court of Appeals affirmed their convictions in February 1914. They were executed at Sing Sing on April 13, 1914.

Becker was prosecuted separately. His first conviction was reversed, but a second conviction was affirmed. The Court of Appeals summarized the prosecution theory that Rose, Webber and Vallon hired the gunmen at Becker's direction. Becker was executed in 1915.

The convictions establish criminal responsibility in the Rosenthal case. They do not prove every sensational story later told about Horowitz, including tales that he attacked random strangers or broke people's backs for amusement.

Relationship to other Jewish-American gangs

The Lenox Avenue group belonged to the same broader New York gunmen-and-gambling environment as remnants of the Eastman Gang and other Lower East Side factions. Overlap in ethnicity, neighborhood or associates does not establish that it was a formal Eastman successor.

Its documented endpoint was abrupt: the Rosenthal prosecutions removed its four best-known gunmen. No evidence reviewed supports a single institutional merger into a later syndicate.