Police fear a personal dispute could have triggered a murder in Hove.
Xhem Krasniqi, known as Jim, died after being shot in Church Road, junction with Selborne Road, on Saturday night.
A post-mortem, carried out last night, has concluded that he was hit once in the abdomen.
Jim was taken to hospital after being shot and died there shortly afterwards.
He had been with his brother and nephew when they were shot at in the street. Neither of them were injured.
Detective Chief Inspector Jeff Riley said: "Xhem's family are extremely distressed and we are offering them the support of our family liaison officers.
"I have assured them that we are doing all we can to trace his killer and ensure he is brought to justice.
"I would like to thank the local community for their support and patience whilst this investigation is ongoing. They have been helpful in telling us what they saw that night. We have taken this information and are undertaking intelligence work in an effort to trace those we would very much like to talk to.
"We believe the men all knew each other and we are open-minded as to the motive. The initial indication is that there's a personal dispute between some members of two families and that this has escalated dramatically, leading to the Xhem's tragic death.
"This has been a distressing incident for local people, especially those who witnessed the shooting, but I can assure them that this was not a random incident. I would urge them to talk to neighbourhood policing officers if they have concerns.”
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