The Death of Stephen Hilder, aged 20, occurred on 4 July 2003 at Hibaldstow Airfield, England, in an incident in which Hilder fell 4,000 metres (13,000 ft) to his death when, during a 3-person team skydive, both his main and reserve parachutes failed.
The investigation into the death, "unique in British crime history", revealed expert-level tampering with both canopies, but failed to determine whether the incident was murder or suicide.