United Kingdom, July 8 -- Gary Coleman's ex-wife has failed a voluntary lie detector test about the circumstances surrounding his death.

The late Diff'rent Strokes actor - who died from an intracranial haemorrhage at the age of 42 after falling at home - married Shannon Price in 2007 but they divorced the following year, though she continued living together and in May 2010, she claimed she had found Gary in a pool of blood following his fall.

The actor's death was ruled accidental and Shannon was never charged with a crime, but she has faced questions over her involvement with Gary's passing, and a 911 recording of her emergency call revealed her refusing to listen to the operator's instructions to help.

Speaking in upcoming series Lie...