News of people being killed in knife attacks recurs with tragic regularity, but the reports rarely touch on the impact on the victim’s family and friends. In this programme Sarah O'Connell sets out to understand these ripple effects — some perhaps expected, others likely not — as she explores the case of Russell “Barty” Brown, who was stabbed to death in Bethnal Green, east London, in September 2016.

As she speaks to Barty's friends and family, to the medic who treated him and a witness to this terrible incident, Sarah hears about the gap he has left in all their lives, and what kind of a man he was in life.

Producer: Giles Edwards