The Shankill Butchers was an Ulster loyalist gang—many of whom were members of the Ulster Volunteer Force (UVF)—that was active between 1975 and 1982 in Belfast, Northern Ireland. It was based in the Shankill area and was responsible for the deaths of at least 23 people, most of whom were killed in sectarian attacks. The gang was notorious for kidnapping and murdering random Catholic and suspected Catholic civilians; each was beaten ferociously and had his throat hacked with a butcher's knife. Some were also tortured and attacked with a hatchet. The gang also killed six Ulster Protestants over personal disputes, and two other Protestants mistaken for Catholics. Most of the gang were eventually caught and, in February 1979, received the longest combined prison sentences in United Kingdom legal history. However, gang leader Lenny Murphy and his two chief "lieutenants" escaped prosecution. Murphy was killed in November 1982 by the Provisional IRA, likely acting with loyalist paramilitaries who perceived him as a threat. The Butchers brought a new level of paramilitary violence to a country already hardened by death and destruction. The judge who oversaw the 1979 trial described their crimes as "a lasting monument to blind sectarian bigotry".
Much of what is known about the Butchers came first from Martin Dillon's The Shankill Butchers: A Case Study of Mass Murder (1989 and 1998). In compiling this detailed work, Dillon was reportedly given unlimited access to the case files of the Royal Ulster Constabulary (RUC), who eventually caught the gang. The commander of the Shankill Butchers gang was Lenny Murphy. Murphy was the youngest of three sons of Joyce (née Thompson) and William Murphy from the loyalist Shankill Road area of Belfast. At school he was known as a bully and would threaten other boys with a knife or with retribution from his two older brothers. Soon after leaving school at 16, he joined the UVF. Murphy often attended the trials of people accused of paramilitary crimes, to become well acquainted with the laws of evidence and police procedure.