An inquiry is about to decide if the killing by a Met officer of Mark Duggan was lawful.
Mistaken identity leaves a young father dead and detectives trying to catch his killers.
Trident, the Met's specialist gang unit, tackle drug dealers in south London.
London by night has its own challenges. Tackling the city's crime is different after dark.
Homicide investigate the tragic death of a four-month-old baby.