John Actie, who was wrongly accused of Lynette White s murder in 1988, met with the forensic scientist Dr Angela Gallop who helped prove his innocence for new ITV true crime series.
The six hidden pieces of evidence that led to Lynette White s killer walesonline.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from walesonline.co.uk Daily Mail and Mail on Sunday newspapers.
CHRISTOPHER STEVENS: An hour with Dr Angela Gallop is like a tutorial from a real-life Sherlock Holmes. True crime enthusiasts, grab a pen and make notes as you watch.