Cardiff and Vale of Glamorgan coroner Dr Lawrence Addicott decided against an inquest after a post-mortem examination because Dr Williams' death was natural causes.

BBC: Massage Parlour

But a month later, after a second post-mortem examination by another pathologist, he changed the cause of death to a brain haemorrhage.

BBC: Tomlinson pathologist 'irresponsible' in earlier cases

The death of a Chicago lottery winner has led to a murder investigation after a post-mortem examination found he died of cyanide poisoning.

BBC: Cyanide 'killed Chicago lottery winner' Urooj Khan