http://www.bbc.co.uk/news/uk-england-29251735
Can you imagine how this girls family will feel if it turns out he is involved.
Police searching for 14-year-old Alice Gross are treating a 41-year-old man with a murder conviction as a suspect in her disappearance.
Arnis Zalkalns went missing a week after Alice and used the Grand Union Canal route to get to work.
Alice, from Hanwell, was last seen on CCTV cameras on 28 August by the same canal route in west London.
Mr Zalkalns served seven years in prison for murder in Latvia, after being convicted in 1998.
Police say he was arrested in London in 2009 for indecently assaulting a 14-year-old girl, but no further action was taken.
Mr Zalkalns was seen on CCTV on 28 August cycling along Brentford Lock at 16:00 BST, some 15 minutes after Alice walked that route. He was last seen on 3 September.
Detectives believe he is likely to have come across Alice as they were both going in the same direction, north along the canal towpath.
Can you imagine how this girls family will feel if it turns out he is involved.