The parents of murdered Rhys Jones have renewed 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.
His father, Stephen Jones, said next week would be traumatic for the family as it would have been Rhys's 12th birthday and their wedding anniversary.
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.
Rhys's mother, Melanie, appealed for the man who called police on 22 August with information to call back.
The couple said they faced a traumatic week with their son's 12th birthday and their 20th wedding anniversary.
The couple said they believed there were people who could help detectives.
They said they "could not move on" until the killer was found.
A man rang police with vital information just after 2300 BST on the night of the killing, 22 August, but has not made contact again.
The police officer in charge of the investigation almost broke down as he underlined their appeal at the press conference at Merseyside police headquarters.
Seventeen arrests
I really, really can't come to terms with what they're going through Det Supt Dave KellyMerseyside Police
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."
Seventeen people have been arrested over the shooting in Croxteth on 22 August but nobody has been charged.
His voice breaking with emotion, he said: "I really, really can't come to terms with what they're going through."
It is thought Rhys may have been hit in crossfire by a gang member who intended to shoot a rival.
The officer said it was "only a matter of time" before the killer would be caught.
The schoolboy was walking home from football practice through the Fir Tree pub car park in Croxteth, Liverpool, when he was shot dead.
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.
Rhys's parents say a community centre would be the "best tribute"
Mrs Jones urged a mystery caller who spoke to the police at 2310 BST on Saturday 25 August to get back in touch.
Meanwhile a memorial fund has been set up to pay for a new £1.5m community centre to be named after the schoolboy.
Rhys Jones was shot as he walked home after playing football
Dave Saville, chairman of the Croxteth Country Park Residents' Association, said the centre would provide somewhere for the area's children to spend time.
Detectives also want to trace a woman who was driving a red car past the scene.
"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.
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.
He said that Croxteth Park was one of Europe's biggest housing estates but there was nothing there for the community.
"All that changed on that Wednesday when Rhys was on his way back from a game of football and lost his life.
"The only things are a pub, a few shops and a church. There are no facilities for the children."
"There are people out there who know who has done it and I appeal for them to come forward."
Red car
Mrs Jones said: "The only reason we are here today is because we need help.
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."
"We need the person who killed our son to be brought to justice to give us a bit of peace.
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.
"I am pleading with that man who phoned 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.
Officers are still examining CCTV footage which was filmed on the night of the murder.
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."
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.
