The parents of murdered Rhys Jones are to renew their appeal for help to catch his killer, four weeks to the day after he was fatally shot in Croxteth.
The mother of murdered schoolboy Rhys Jones has urged a mystery caller who contacted police days after his killing to get back in touch.
Seventeen people have been arrested over the shooting in Croxteth on 22 August but nobody has been charged.
Melanie Jones and her husband Stephen renewed their appeal for help to catch their son's killer four weeks to the day after he was shot dead in Croxteth.
Stephen and Melanie Jones along with police have already appealed for a man who rang detectives to phone again.
The couple said they faced a traumatic week with their son's 12th birthday and their 20th wedding anniversary.
It is thought Rhys may have been hit in crossfire by a gang member who intended to shoot a rival.
They said they "could not move on" until the killer was found.
The schoolboy was walking home from football practice through the Fir Tree pub car park in Croxteth, Liverpool, when he was shot dead.
The police officer in charge of the investigation almost broke down as he underlined their appeal at the press conference at Merseyside police headquarters.
A man rang police on the night of the killing on 22 August just after 2300 BST but has not made contact again.
I really, really can't come to terms with what they're going through Det Supt Dave Kelly
Detectives also want to trace a woman driving a red car past the scene.
Det Supt Dave Kelly said: "Do the honourable thing and come forward."
Rhys's parents say a community centre would be the "best tribute"
His voice breaking with emotion, he said: "I really, really can't come to terms with what they're going through."
Meanwhile a memorial fund has been set up to pay for a new £1.5m community centre to be named after the schoolboy.
The officer said it was "only a matter of time" before the killer would be caught.
Dave Saville, chairman of the Croxteth Country Park Residents' Association, said the centre would provide somewhere for the area's children to spend time.
Rhys was walking home from football practice through the Fir Tree pub car park in Croxteth, Liverpool, when he was shot dead on 22 August.
"The plan is to include sports facilities such as five-a-side pitches for older children, playgrounds for youngsters and also computers for general use.
Mrs Jones urged a mystery caller who spoke to the police at 2310 BST on Saturday 25 August to get back in touch.
He said that Croxteth Park was one of Europe's biggest housing estates but there was nothing there for the community.
Rhys Jones was shot as he walked home after playing football
"The only things are a pub, a few shops and a church. There are no facilities for the children."
Detectives also want to trace a woman who was driving a red car past the scene.
Red car
Mr Jones, a supermarket night shift manager, said: "Four weeks ago we were a normal happy family, with us, Rhys and his older brother Owen.
Rhys's parents, Melanie and Stephen Jones, said it would be "the best tribute to our son we could possibly think of and we urge people everywhere to support the project."
"All that changed on that Wednesday when Rhys was on his way back from a game of football and lost his life.
The motorist police want to trace was driving along Fir Tree Drive North at 1935 BST and it is thought there was a child of about three years of age in the back.
"There are people out there who know who has done it and I appeal for them to come forward."
They would also like to speak to anyone who was at The Fir Tree pub between 1900 BST and 2000 BST who may not have come forward.
Mrs Jones said: "The only reason we are here today is because we need help.
Officers are still examining CCTV footage which was filmed on the night of the murder.
"We need the person who killed our son to be brought to justice to give us a bit of peace.
Det Supt Dave Kelly said: "I am particularly interested in talking to the gentleman who rang in on the night of Rhys's murder and the lady who was in the red car."
"I am pleading with that man who phoned to come forward."
He added: "I believe that they could both have information which could help move the inquiry forward and we need to speak to them directly, and I would urge them to contact us."
Twelve people have been bailed during the inquiry and a further five released without charge. The five are now being treated as witnesses.
