1/3. The work of Trident, the Metropolitan Police's operational command unit dedicated to tackling gun crime in London's black communities.

The north London team investigate the killing of a 24-year-old member of a notorious gang. Although the shooting happened on a busy main road, it seems nobody recognised the gunman or his accomplice. Strong content.

Pick of the Day: Murder Blues: Rod Austin, one of the special detectives tackling London's rising gun crime

Documentary of the Week: Murder Blues 9.00 Pm BBC1
I'll be surprised if a more sobering, frightening documentary comes along this year, and for anyone living in London this stark and terrifying picture of gun crime will probably provide the most unwelcome of wake-up calls.
Murder Blues focuses on the work of the Metropolitan Police's Operation Trident, set up to tackle the "black on black" gun crime that's ravaging the city and leaving many streets at the mercy of murderous gangs. The figures speak for themselves: 70 per cent of London's shootings are between members of the black community, more than 100 of whom have been shot dead in the past five years.
As one police officer ruefully remarks, in the old days fights and feuds were settled with fists. Now gun use is utterly routine, the weapons wielded by people who are unafraid to use them to "resolve" the pettiest of disputes. One man is lucky to escape with his life after he's held at gunpoint during a road rage incident, another is forced to move house after he's ambushed at gunpoint outside his home. Trident is also called to investigate the shooting dead of a notorious gang member in Tottenham, north London. We follow the inquiry as police probe the man's immediate past to look for anyone with a motive. (Alison Graham)