The murder of Michael Gilbert occurred in 2009 in the United Kingdom. His decapitated body was found in a lake in Arlesey. He had for years been kept as a slave and subjected to abuse by the Watt family, six of whom – including James Watt, the ringleader – were jailed for their role in the murder. Gilbert, who had an unstable childhood, was considered a vulnerable and naive man who was easily exploited.