Detectives at Special Branch say after exhaustive investigations, they have identified a new lead in their inquiry into the bizarre murder of MI6 officer Gareth Williams.
Mr Williams was found dead and padlocked in to a sports bag, placed in the bath of his Alderney Street flat in London.
Detective Superintendent Martin Reeves, who is leading the investigation, says they are following up what could be a significant lead.
"There are similarities between this case and several others of a similar nature and we are working on the theory they are related."
"Today I can name Toni Mancini as a person we are interested in speaking to. He's described as being of Italian descent with a pock-marked face and slick-backed dark hair. Oh, and he's a zombie, having died in 1976."
It's believed Mr Mancini is the same person cleared of killing 42 year old Violet Kaye and stuffing her body into a trunk in Brighton in 1934. Mancini subsequently admitted using a hammer to kill Ms Kaye while on his death-bed.
"Mr. Mancini is our only significant lead at the moment." Det. Supt. Reeves said.
"If it's not him, then it's John Holloway, who was hanged for killing his wife and stuffing her into a trunk in the 19th century. And no-one wants to see a 200 year old zombie."