Family: Military changed Dallas suspect; robot use defended

Dallas Police Chief David Brown answers questions during a news conference, Monday, July 11, 2016, in Dallas. Five police officers were killed and several injured during a shooting in downtown Dallas last week. Dallas Police Chief David Brown answers questions during a news conference, Monday, July 11, 2016, in Dallas. Five police officers were killed and several injured during a shooting in downtown Dallas last week. An FBI evidence response team works the crime scene, Sunday, July 10, 2016, where five Dallas police officers were killed Thursday, in Dallas.