Crimewatch reveals exclusive developments in the murder of John 'Goldfinger' Palmer, shot in his garden in Essex in what police believe was a professional hit. Palmer was killed in June with police initiallybelieving he'd died of a cardiac arrest, not realising he'd been shot until nearly a week later.The 65-year-old was jailed for eight years in 2001 for masterminding a timeshare fraud targeting people across the UK. Palmer's wealth was once estimated at £300m. He owned helicopters, a French chateau and a £1m mansion in Bath, and was once considered one of the biggest landowners on Tenerife.Crimewatch unveils new leads in the case, which Essex Police hope viewers will be able to help with.