Police have said the investigation into the murder of 13-year-old Milly Dowler remains an "active inquiry" after a man arrested in connection with the probe was released without charge.
The 40-year-old from west London, named locally as Nirmal Gharu, was questioned for several hours over the disposal of a red Daewoo Nexia car.
Detectives believe prime suspect Levi Bellfield used the car to transport Milly's body from Walton-on-Thames, Surrey, in March 2002.
The death of Amanda Dowler, known to her family and friends as Milly, remains one of Britain's most notorious unsolved crimes.
The fate of the red car, owned by Bellfield's then girlfriend Emma Mills, is central to the continuing police inquiry. It was captured on CCTV minutes after Milly disappeared while walking home from school in Walton-on-Thames on March 21 2002. Six months later, her skeletal remains were found 30 miles away by mushroom pickers in Yateley Heath, Hampshire.
A Surrey Police spokeswoman said: "The 40-year-old man arrested by Surrey Police after voluntarily attending a police station has been released without charge.
"The man, from west London, was questioned about the potential disposal of a red Daewoo Nexia car, which police have appealed for information about as part of their investigation into the murder of Milly Dowler. The investigation into Milly's death remains an active inquiry."
Officers have been painstakingly building a case against Bellfield since he was arrested by the Metropolitan Police in November 2004 over other matters.
Bellfield, 41, was told last year that he would die in jail after he was found guilty of murdering students Marsha McDonnell, 19, and Amelie Delagrange, 22.
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He was also convicted of the attempted murder of schoolgirl Kate Sheedy, 18. All of the women were attacked near bus stops in south-west London.
