Detectives renewed an appeal to find one of Britain’s most wanted men, who escaped from custody in India.
Mohammed Ali Ege, 43, is wanted in connection with the murder in 2010 of Aamir Siddiqi in Cardiff.
Siddiqi, 17, was killed by hitmen in front of his parents in a case of mistaken identity.
Mr Ege fled to India and was apprehended in 2013. But he fled four years later while awaiting extradition.
South Wales Police renewed their appeal for information to find him after a plea for help from the Siddiqi family.
“Our beloved son Aamir was our loving, funny, intelligent and generous child who was about to embark on the next phase of his life, at university,” his parents said.
“We urge anyone who has any information that could help the police with their inquiries to please get in touch. Your call might help bring an end to the very long ordeal for our family and potentially, help to prevent this kind of tragedy happening again.”
Officers are seeking information from anyone, in any country, about Mr Ege’s whereabouts.
It was April 2017 when he escaped from police custody. He is known to have changed his appearance and authorities suspect he travels extensively using false identity documents.
“We continue to work with the National Crime Agency and international law enforcement agencies to trace Mr Ege and return him to the UK,” a South Wales Police representative said.
Siddiqi, 17, died at his home in Roath, Cardiff, after receiving multiple stab wounds.
Ben Hope, then 39, and Jason Richards, then 38, were each paid £1,000 (Dh5,049) to murder a middle-aged man over an unpaid debt. But they went to the wrong house and killed Siddiqi by mistake.
Hope and Richards were found guilty of Siddiqi’s murder and the attempted murders of his parents. They were sentenced to life in jail.