This gallery displays 14 murder victims from the year 2011 whose cases remain unsolved. Can you help?
This gallery does not include the cases of Wlodzimierz Szymanski and Aaron McQueen-Williams.
Mr Szymanski, 59, was found dead with a broken neck at a house in Chandos Road, Willesden, on March 18, 2011. A woman was arrested on suspicion of murder but released with no further action following consultation with the Crown Prosecution Service.
Aaron McQueen-Williams, 23, died of head injuries after falling out of a car on the A40 in Ealing on May 26, 2011. Police classed his death as ‘unexplained.’