The parents of a Somali murder victim from Cardiff have made a fresh plea to track their son's killer, a year after he was attacked.
Police want to interview Mohamoud Mahad
Mohamed Musa, 22, was attacked in the Butetown area of the city last April and died in five days later.
Detectives particularly want to trace another Somali man over the murder, and a £5,000 reward is still available for information leading to his arrest.
Mr Musa's parents say their lives "have stood still" since his death.
He suffered head injuries after being attacked outside a flat on Angelina Street at 0245 BST on 18 April - the early hours of a Friday morning.
Mr Musa had been socialising with a group of friends at the flat, when another group of men arrived outside and he was attacked.
He died on 23 April in the University Hospital of Wales in Cardiff.
A £5,000 is still being offered for information resulting in an arrest
Police have been trying to track down another Somali man, who was born in Kenya and is commonly known as Mohamoud Mahad and also as Mahmoud Ahmed Hersi.
He also goes by the nicknames 'Mafia' and 'Yabada.'
Mr Musa, who was married with a two-year-old son with another child expected around the time of his murder, was a former pupil at Fitzalan High School and had nine brothers and sisters.
He had lived in Cardiff for 11 years after spending his early years in Reading and Swindon. His met his wife in Somalia, and she is still there with the couple's children.
His parents Musa Yusef and Noora Mohamed said: "Our son was the victim of a brutal attack and since that day our lives have stood still.
"We would ask anyone who knows anything about what happened to Mohamed to speak to the police and help them catch who did this."
Detective Chief Inspector Paul Bethell, who is heading the inquiry, appealed for anyone with information, particularly in the city's Somali community, to get in touch, saying all calls will be treated in the strictest confidence.
"The family are still coming to terms with what has happened, and South Wales Police remain determined to solve this case so that Mohamed's family can begin to piece their lives together again.
Mr Mahad is described as six feet tall, medium build, with brown eyes and hair, which is possibly cropped to the sides and longer on top, and with a thin moustache.
Anyone with information as to his whereabouts should contact Rumney Police Station incident room on 029 20 527420 (daytime) or 029 20 222111 ext. 31310 (out of hours), or Crimestoppers on 0800 555111.