Police have launched a fresh appeal for information about the murder of Anton Hyman in Ealing 13 years ago, with a £20,000 reward on offer.

The 17-year-old's body was found in the River Brent, W7 at around 11.10am on March 21 2004 - Mother's Day.

Anton, who lived with his family in Acton, had been stabbed multiple times and shot in the back.

Vanessa Hyman, Anton's mother, said: "Mother's Day, Sunday 21st March 2004, should have been a happy time with my family.

"Police knocked on my door to tell me my 17-year-old son Anton had been murdered.

"He had been shot, beaten and stabbed.

"Thirteen years on and still the killers of Anton have not been identified and brought to justice.

"Anton has a little sister; she was only six-years-old when she lost her brother.

"The innocence of her childhood was taken away. The lives of our family changed forever.

"We need answers, we need to know what happened but most of all we need justice for Anton.

"Somebody must know who killed Anton; somebody must have noticed something, seen something or heard something.

"There seems to be a wall of silence around his killers.

"Anton is dearly missed by his family and friends. We appeal to anyone who has information to please come forward."

Anton's last movements were captured on CCTV at about 8pm on March 20 2004, and detectives believe that he was killed that evening.

Someone answered a call from Anton's phone that evening, at a time when officers think Anton would have already been dead, but efforts to trace that person have been unsuccessful.

He was last seen between Greenford Avenue and Brent Valley Park in Hanwell.

Anton was black, 5ft 6in and of slim build.

On the evening police believe he died, he was wearing distinctive bright multi-coloured gloves, blue and white Timberland boots, dark jeans, dark grey fleece, a green t-shirt and a green shirt with "Iceberg" written on the breast pocket.

Nine men and one woman have been arrested in connection with the murder, but all were released with no further action taken.

Officers have carried out extensive enquiries, examining CCTV to track Anton's movements and speaking to many witnesses as well as launching numerous public appeals for information in the years since Anton's death, but to date no one has been charged in connection with the murder.

Detectives believe that there are witnesses and friends who have important information that would lead to a breakthrough in the case.

A new £20,000 reward is available for anyone who provides information that leads to the arrest and conviction of the person responsible for Anton's death.