London gang leader Charlie Richardson, who was a rival to the Kray twins, has died, according to Sky sources.
Mr Richardson was boss of the 'torture gang', based in the south east of the city.
He had been trying for years to clear his name after he was jailed for 25 years in 1967 when the Old Bailey heard lurid evidence from men who fell out with him and his brother Eddie and were summoned to their scrap metal yard.
A key prosecution witness was travel agent Lucian Harris, who said he was tortured with electrodes from spark plugs, for information after his partner disappeared owing the Richardsons money.
Mr Richardson said a key witness lied and the judge was biased because he knew one of his fellow defendants and the jury foreman.