Police: Suspect No.1: Season 4, Episode 1

4 - 1: Grimsby Gang Fight

With exclusive access to Humberside CID, this series reveals the meticulous work of detectives as they navigate their way through the twists and turns of an investigation, gathering the clues that could ultimately reveal the truth. In Grimsby, a vicious mass street brawl causes mayhem and leaves innocent victims with serious injuries in its wake - one person with a critical head wound. Police initially arrest three men but are then thrown into a desperate race against time to find their accomplices before one of them flees the UK to Romania.