In June 2015, John "Goldfinger" Palmer was shot six times in the garden of his secluded woodland mansion in Essex. But due to an oversight in the police response, the 65-year-old's death was put down to natural causes - until a murder investigation was eventually launched six days later. Ten years on, detectives are still hunting whoever killed the man once described as Britain's richest criminal.

Palmer earned his nickname following the audacious 1983 Brink's-Mat robbery.

Armed men disguised in security uniforms stumbled upon £26m worth of gold, diamonds and cash in a warehouse just outside London Heathrow Airport.

Jewellery dealer Palmer was accused of melting down the gold in a shed in the garden of his mansion near Bath.

Thirty-two years later, on 24 June 2015, he was gunned down as he was burning documents in the garden of his home in South Weald near Brentwood.