Gunman said to have targeted Baton Rouge police for assassination

East Baton Rouge Parish Sheriff Sid Gautreaux, left, describes how gunman Gavin Long killed three local police officers during a news conference as Louisiana State Police Superintendent Colonel Mike Edmonson, center, looks on at the Governor's Office of Homeland Security and Emergency Preparedness on July 18, 2016 in Baton Rouge, Louisiana. Long who traveled from Kansas City, Missouri was fatally wounded after he ambushed police officers, which left three dead and several wounded. [Photo/VCG]