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.
Scotland Yard said a post-mortem examination held at Kingston mortuary found a single stab wound on Carole Waugh's body.
Police said further examinations will be made to establish the exact cause of Miss Waugh's death.
Miss Waugh, 50, originally from Durham, had 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.
Earlier this week a 47-year-old man was arrested on suspicion of kidnap and conspiracy to defraud and subsequently on suspicion of murder.
The suspect is in custody at a south London police station. A warrant for further detention was granted at Croydon Magistrates' Court yesterday, Scotland Yard said.
The body has not been formally identified and was taken to Kingston mortuary. A post-mortem examination will take place later today.
Ms Waugh, of Harrowby Street, central London, was reported missing by her family on May 7 and had never gone missing before.
The last believed sighting of her was thought to be in central London three days earlier, but this was unconfirmed.
To date, 10 people have been arrested in connection with the investigation.
Detectives said Ms Waugh, who previously lived in Libya, met men through a variety of internet sites including dating websites and were investigating the possibility that she might have been an escort.