The hour-long documentary won a Bafta in the Current Affairs category of the awards at the Wales Millennium Centre.
The programme documented the crimes of John Cooper, one of the most notorious criminals in British history.
Cooper burgled, raped and murdered during a 15-year reign of terror, which included four executions by shotgun. And, far from keeping a low profile between crimes, he even took time to appear on the gameshow Bullseye.
ITV Wales had exclusive access to the police enquiry and the forensic science which finally trapped Cooper.
‘The Bullseye Killer’ was transmitted the night Cooper was jailed in May 2011.