Detectives have appealed for anyone in a "crowd" which gathered around a dying teenager to come forward if they have not yet spoken to the police.
Liverpool Echo reports that Merseyside Police launched a fresh appeal for information on the third anniversary of the murder of Nyle Corrigan.
The 19-year-old died from a single gunshot wound to the back after being hit by a bullet on Boode Croft, Stockbridge Village, at around 6.30pm on November 12, 2020.
Residents living close to the scene at Boode Croft told the ECHO at the time that the teenager was shot a short distance away from the cul-de-sac, before staggering towards a house where he collapsed.
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