Police are urging two witnesses to come forward to help the murder investigation of Litherland man Connor Dockerty.
The 23-year-old was repeatedly stabbed and killed outside a parade of shops on Kingsway in Huyton on Monday April 19.
Officers investigating his death would like to speak to two men who are believed to have left a shop, Gentwoods News, also on Kingsway, at around 8pm that night.
One of the men was wearing a distinctive black and yellow Moschino T-shirt and had tattoos on his arms.
Both men were stood outside the shop when the incident occurred and it is believed they may have witnessed the incident.
Detective Chief Inspector Siobhan Gainer said: “I would like to stress that there is no suggestion that these men were in anyway involved in the incident but we would like to speak to them as we believe they could help with our investigation.
“I would encourage them to come forward to speak to detectives as soon as possible as their information could be vital to our enquiries.
“This has obviously been a traumatic time for Connor’s family and friends and we have been pursuing a number of lines of enquiry since his death in order that we can bring whoever is responsible to justice.”
A 14-year-old male has been charged with murder. A 15-year-old male and a 15-year-old female arrested on suspicion of murder have both been released on conditional bail.