Real Hard Cases: Unsolved crimes reinvestigated

Some serious crimes are open-and-shut cases, what the cops call no-brainers, but others- the REAL HARD CASES - remain either unsolved or with serious doubts hanging over them. Sometimes for years. Now, after a legendary crime-fighting career, former Glasgow detective Les Brown and bestselling crime writer Robert Jeffrey reinvestigate some of the hardest cases around and come up with some startling conclusions.