Claims that Grangemouth-born child killer Robert Black confessed to more murders are being investigated by police.
It comes days after the Northern Ireland Prison Service revealed his ashes had been scattered at sea after no-one came forward to claim his body.
Black, who was convicted of murdering four young girls across the UK, died in Maghaberry prison last month.
English detectives recently travelled to Northern Ireland to question another prisoner currently serving life for the murder of a toddler who claimed Black had told him he had committed several other murders.
The prisoner had told authorities at the jail of the alleged confession following the serial killer’s death.
Although Black was convicted of the four murders, he never admitted any of them.
The former van driver is suspected of at least 12 other unsolved child murders, including that of Genette Tate who disappeared in Devon in 1978 and her body has never been found.