On the evening of October 15, 1890, Hennessy was shot by several gunmen as he walked home from work. It is likely that the gunmen were wielding sawn-off shotguns (known in Italian terms as
lupara): a common type of execution among
mafiosi. Hennessy returned fire and chased his attackers before collapsing. When asked who had shot him, Hennessy reportedly whispered to Captain William O'Connor: "
Dagos." Hennessy was awake in the hospital for several hours after the shooting and spoke to friends but did not name the shooters. The next day he died from complications related to his injuries. Hennessy was buried in
Metairie Cemetery. There had been an ongoing feud between the Provenzano and Matranga families, who were business rivals on the New Orleans waterfront. Hennessy had put several of the Provenzanos in prison, and their appeal trial was coming up. According to some reports, Hennessy had been planning to offer new evidence at the trial to clear the Provenzanos and implicate the Matrangas. That would mean that the Matrangas, not the Provenzanos, had a motive for the murder. A policeman, a friend of Hennessy, later testified that Hennessy had told him he had no such plans. In any case, it was widely believed that Hennessy's killers were Italian. Local papers such as the
Times-Democrat and the
Daily Picayune freely blamed "Dagoes" for the murder. Various newspaper accounts of the era linked Hennessy's murder to Esposito and the Mafia. ==Aftermath==