Where do all those consultants come from and can someone advise them to do a job that is useful? Not necessary, says Prof. Dr. Onno Bouwmeester. Young doctor Laura Keesman obtained her PhD on research into violent interactions by the police. When and why does Uncle Cop eagerly reach for his bat? Dr. Sophie van der Zee knows everything about lying and cheating, and what to look out for if you want to detect a lie.