Police are offering a £50,000 reward for information leading to a conviction for the murder of a 16-year-old.
Kennie Carter was fatally stabbed in the chest in Stretford, Manchester on January 22 last year and died in hospital.
Twelve teenagers aged between 13 and 18 were arrested on suspicion of murder and all were released under investigation as enquiries continue.
Now, Greater Manchester Police has offered a reward to anyone who has information which leads to a conviction.
Detective Chief Inspector Alicia Smith, from GMP’s Major Investigation Team, said: “The thoughts of everyone in the investigation team remain with Kennie’s loved ones at this time.
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Police officers at the scene of the crime last year (PA)“They have lived through a year without Kennie and are desperate for answers and I hope you will think of them today.
“This is a long and meticulous investigation, through which we have spoken to over 100 people, reviewed over 100 hours of CCTV and carried out dozens of warrants.
“We have also arrested all of the people that we wanted to speak to in connection with this incident.
“I believe we are close to getting justice for Kennie and I am confident that there is someone out there who holds key information about this case who has not yet made themselves known to us.
“Please don’t assume that we already know the information you hold. What you know could be the last piece that we need.
Officers say they are "close" to finding justice for Kennie (MEN Media)“I understand you might be scared but I would like to stress that murder investigations are never closed. We will never stop seeking the truth and we will not stop until Kennie’s killers are safely behind bars.
“Please do the right thing – clear your conscience, come forward.”
Earlier today, officers at a press conference said progress was being made on the case but that they needed “pieces to the jigsaw”.
Sergeant Marc Foster of GMP Stretford added: “The local community remains devastated by the death of Kennie Carter.
“We are continuing to support the family and are working closely with the community, providing high visibility patrols in the area.
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“Our community has come together united against knife crime, and we will continue to support them and the investigation team to secure justice for Kennie.
A £50,000 reward has been offered (Manchester Evening News)“I would like to thank members of the public who have already provided us with key information.
“However, I would now like to address those who have not yet come forwards.
“There are people out there who know what happened that evening. Please check your conscience and do the right thing.
“It was a cowardly attack on a young teenager with his whole life in front of him.
“The investigation is live and we are responding to any new information given.
“Please don’t assume we already know the information you hold. Tell us again anyway, because it might be the key to securing a charge and conviction for those responsible.”