Operation Trident, or simply Trident, is a Metropolitan Police unit originally set up in 1998 as an initiative with the police to tackle "black-on-black" gun crime following a series of shootings in the London boroughs of Lambeth and Brent. By 2008 the unit was responsible for investigating all non-fatal shootings for the Metropolitan Police, and in February 2012 the unit's remit was again expanded: the new Trident Gang Crime Command was launched, incorporating responsibility for tackling wider gang crime. In 2013 the unit gave up responsibility for investigating fatal shootings, which was taken over by the Homicide and Serious Crime Command.