A body found in a lock-up garage in New Malden, south west London, has been formally identified as missing oil executive Carole Waugh, Scotland Yard said tonight.
A post-mortem examination found the cause of Miss Waugh's death was a single stab wound, police added.
Miss Waugh, 50, originally from Durham, has not been seen by her family since mid-April and concerns for her safety grew after a fraudster tried to sell her central London flat by posing as her brother.
Scotland Yard said the body was found in a garage in Lime Court, New Malden, south west London, last night.
On Wednesday a 47-year-old man was arrested on suspicion of kidnap and conspiracy to defraud and subsequently on suspicion of murder.
Detectives said she met men through a variety of internet sites, including dating websites, and they were investigating the possibility that she might have been an escort.
So far, a total of 10 people have been arrested in connection with the inquiry into Miss Waugh's disappearance. At least three women have tried to pose as her since she vanished, police said.
Miss Waugh, who owned a flat in Harrowby Street, Marylebone, was reported missing by her family on May 7. They last saw her at a family party in mid-April.
She had lived and worked in Libya for a number of years, but returned to London in 2008 and would regularly visit relatives in Durham and Cumbria.