Members of a St. Louis County investigative team canvass the neighborhood near the Ferguson Police Department, asking residents if they have any information about last night's shooting, in Ferguson, Missouri March 12, 2015. The shooting of two police officers in Ferguson, Missouri, during a protest rally sparked an intense manhunt for suspects on Thursday and ratcheted up tensions in a city at the centre of a national debate over race and policing. REUTERS/Kate Munsch (UNITED STATES - Tags: CRIME LAW POLITICS)