Overview
William O'Brien (1850 – unknown), 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 was himself gunned down by Shang Draper. Although surviving his wounds, he was tried for, and acquitted of, Walsh's death.
Like many of the Dutch Mob, O'Brien was also associated with the infamous bank robber George Leonidas Leslie and his gang. Nearly a year after the Walsh murder trial, he was among those suspected of Leslie's murder in 1884. He was among those profiled in Thomas F. Byrnes's Professional Criminals of America (1886).
Biography
William O'Brien was born in Boston, Massachusetts in 1850. He was a printer by trade but began his criminal activities at a young age. By early adulthood, O'Brien had been arrested in almost every major city in the United States and was considered "second to no one in his business". According to former NYPD police detective Thomas F. Byrnes in Professional Criminals of America (1886), he was described as
By the mid-1870s, he and partner Johnny Irving became members of the Dutch Mob, a major Manhattan pickpocketing gang, which operated east of The Bowery between Houston and Fifth Streets. He and Irving were among the many underworld figures also associated with Marm Mandelbaum. It was during this period that he took part of a number of major robberies with his partners in crime. On October 11, 1877, he was arrested with Irving, Joe Dollard and George Leonidas Leslie for stealing $2,000 worth of silk hat linings from E. Tilges' warehouse on Broome Street. He was held in custody in default of a $4,000 bail set by Justice Morgan, but was subsequently released from police custody.
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