Billy Porter.

About Billy Porter

William O'Brien, better known as Billy Porter but also known by the alias William or Billy Morton, was an American burglar and underworld figure in New York City during the mid-to late 19th century. He and partner Johnny Irving were longtime members of the Dutch Mob along with Little Freddie and Michael "Sheeny Mike" Kurtz. He was present during the 1883 gunfight at Shang Draper's saloon in which Irving was shot and killed by rival John "Johnny the Mick" Walsh. O'Brien then killed Walsh and fled, but was immediately arrested outside the saloon with his .32-calibre pistol still in his coat pocket. He was tried for, and acquitted of, Walsh's death.