Olympic medal-winning eventer Amy Tryon died of an accidental overdose, a coroner has revealed.

The US rider, who won team gold medal at the World Games in Jerez in 2002 and team bronze at the 2004 Athens Games, died on 12 April, aged 42.

The King County Medical Examiner’s Office released her cause of death yesterday, as an “acute combined opiate” overdose.

Her death in her sleep was an accident, the medical examiner ruled.