Mohammed Ali Ege wanted in connection with murder of Aamir Siddiqi.
South Wales Police is appealing for information about the whereabouts of Mohammed Ali Ege, who is wanted in connection with the 2010 murder of Aamir Siddiqi.
Officers are seeking information from anyone in the UK, about Ege's whereabouts since he escaped from police custody in India over a week ago.
He was awaiting extradition but escaped after he was taken to a court hearing - authorities have confirmed that he escaped from a railway station washroom in New Delhi.
Mohammed Ali Ege - who is now 39 years-old - is from the Riverside area of Cardiff but also has connections with people in surrounding areas.
Aamir, 17, was fatally stabbed at his family home in Ninian Road, Roath, Cardiff, at around 1.40pm on Sunday, April 11, 2010. His parents were also seriously injured during the incident.
Detective Chief Inspector Ceri Hughes, from the Major Crime Investigation Team at South Wales Police, said: "This is devastating for Aamir's family who have waited so patiently for the past seven years for justice, but they remain resilient and continue to receive our full support.
"We believe that somebody in this country knows something about Mohammed Ege's whereabouts, and urge such people to contact us using the anonymous Crimestoppers number if they prefer."
Anybody with information is urged to contact 101 quoting reference 1700150924 or call Crimestoppers anonymously on 0800 555 111.