Harry Roberts was responsible for one of the most notorious crimes in Britain, which shook the nation and lead him to become one of the longest-serving prisoners in Britain. Even his parole in 2014 after serving 48 years in prison was a cause of great outrage. The reason for this is that Harry Roberts had gunned down and killed 3 Police officers in front of playing school children before fleeing the scene and evading capture in a nationwide manhunt for more than 3 months.