First of a two-part programme giving an account of one of the biggest unsolved murder cases in Scottish legal history. On trial at Inverness High Court is 80-year-old William MacDowell, who stands accused of killing his former lover Renee MacRae and her three-year-old son in 1976, disposing of their bodies and concealing the murders for 45 years. With in-court access to one of the most long-awaited court cases in Scotland's history, the documentary sits alongside both prosecution and defence as they detail the dramatic twists and turns of this shocking case