Violence is a major problem on Britain's streets, but what happens when a single punch takes a life? Aaron Roach Bridgeman investigates in Channel 5 documentary One Punch Killer.
Suspects returns to Channel 5 on Wednesday 3rd August for a fifth series and introduces three new cast members. James Murray (Cucumber, New Tricks, Defiance), Lenora Crichlow (Being Human, Fast Girls, Sugar Rush, Black Mirror) and Perry Fitzpatrick (This is England) will join original cast members Damien Molony (Being Human, Ripper Street) and Clare-Hope Ashitey (Doctor Foster, Top Boy, The White King and I.T.) in the gripping and innovative crime drama series.