A man arrested over the murder of Melanie Hall was eliminated from police inquiries after undergoing psychiatric tests.
The suspect went to Cheadle Heath police station in Greater Manchester at 2.45am on Thursday after the 25-year-old's bones were found in a bag near the M5 on Monday, 13 years after she went missing following a night out in Bath.
The man, aged 37, believed to be from the Hazel Grove area of Stockport, was arrested on suspicion of murder by Greater Manchester Police.
After undergoing a mental health assessment, detectives from Avon and Somerset Constabulary said he has been "eliminated as a suspect in the Melanie Hall murder inquiry".
The man was being assessed at Stepping Hill Hospital in Stockport.
Detectives from Avon and Somerset Police travelled to Stockport on Thursday to await the result of psychiatric tests and interview the man.
A spokesman for Avon and Somerset Police said: "At the moment he is undergoing a mental health assessment. Our officers were dispatched there yesterday and questioned him. He has now been eliminated as a suspect in the Melanie Hall murder inquiry."
Greater Manchester Police said they are "unsure at the moment whether he is still undergoing tests or has been released into the care of someone".
The parents of Miss Hall said they were not attaching any significance to the arrest. Her father Steve Hall, 65, said he was being kept informed of updates in the murder investigation by police.
"We are not really attaching any real importance to the arrest," he said from his home in Bradford-on-Avon, near Bath.
