Sam Poling investigates the series of crises to have hit Police Scotland, five years after the creation of the national force. She hears damning testimony from serving officers and discovers evidence of misconduct and the manipulation of crime figures. The programme reveals leaked documents which show corruption at the very heart of the force and a culture of fear within its ranks, documents those at the top tried to suppress. She asks the current chief constable whether, with his own controversial background, he is fit to lead. Show less