The family of “the woman with the flower tattoo” has been told her murder may be linked to a serial killer known as The Scalp Hunter and The Canal Murderer.
John Sweeney dismembered two former girlfriends before dumping their bodies in canals in Rotterdam and London.
He was known to be living in Belgium and Holland at the same time as the body of Rita Roberts was found washed up at a water treatment plant in Antwerp.
Police say she met with an extremely violent death – similar to Sweeney’s two victims who were about the same age as Cardiff-born Rita.
Interpol are already looking at Sweeney who is serving a whole life sentence for hacking to death Melissa Halstead, 33, and Paula Fields, 31.
The remains of Miss Halstead, whose head and hands were missing, were found in the Westersingel canal in Rotterdam after she vanished from her Amsterdam flat in 1990.
She was only identified in 2008 after Dutch detectives carried out a cold case review and matched familial DNA.