Police are urging a couple who walked past a murder scene in Scarborough just minutes after a man was stabbed to come forward to help with their investigation.
The man and woman were on Foreshore Road, opposite the Olympia amusement arcades, at about 11.35pm on Saturday 13 April.
A 17-year-old boy, who was stabbed in a leg, shouted to the couple for help while he was phoning for an ambulance.
His friend, 19-year-old Michael Vincent Graham, was fatally wounded in the incident.
“It is very important that the man and woman come forward to assist the investigation without delay.
“We need to speak to them urgently as they may have crucial information or detail that could assist the murder inquiry.
“If you see or hear this appeal, or you believe you were on Foreshore Road in Scarborough late on Saturday night and recall someone shouting for help, please do the right thing and contact the police.”
Please call North Yorkshire Police with any information on 101 – select option 2 – and ask for Scarborough CID.
If you would prefer to remain anonymous, call Crimestoppers on 0800 555 111 quoting reference number 12130058772.
More top news
The cathedral was ranked 60th in figures released by the Association of Leading Visitor Attractions (ALVA).
Bookmakers have released new odds on a number of names following the birth of Cheryl and Liam Payne's son on Wednesday.
Rehearsals have started for Kynren 2017, Bishop Auckland's huge outdoor event representing 2,000 years of British history.