Examines the possible motive put forward by the police after 18 years for Alistair Wilson's murder. The police say new witnesses have come forward and they are investigating fresh leads.
Alistair Wilson's son, Andrew, now aged 20, speaks publicly about his father’s murder for the first time. What was said and how likely is it to unearth new leads?
This features BBC Scotland presenter John Beattie’s account of a tip-off made to him about the Alistair Wilson case while he was working on his lunchtime radio programme.