Detectives investigating the murder of Jamie Starkey who was shot last December in Liverpool are making a fresh appeal for information.
Officers say gang members could have vital information, and believe that allegiances between those involved could have changed in the 7 months since.
Jamie Starkey was shot by a lone male, in dark clothing, shortly before 8pm on Sunday, 2 December 2012 on Higher Lane in Fazakerly. The gunman approached Jamie as he was stood by his car outside his home address. He then shot Jamie and ran off towards the playing fields.
Detective Alyson O’Donnell, said: "This was a cold-blooded, calculated shooting and there is no doubt that the offender meant to kill Jamie on that night.
"Jamie's family have been deeply affected by his loss. Whatever the motive for this murder is, no-one has the right to kill another human being. The message is clear, we are determined to find the person, or people, responsible for this.
"We still have no clear motive, but believe that Jamie's own involvement in criminality is what lay behind this cold-blooded and callous attack outside the family home. I would urge anyone who knows anything to come forward so that we can find those responsible and put them behind bars.
"Jamie's family are still struggling to come to terms with their loss and someone out there knows who did this and can help them find some closure.