President obama is cutting short around the Dallas Police department headquarters. Police have asked that news outlets cut live needs showing officer locations. Earlier Dallas Police said the department received an anonymous threat. Coming about five 48 hours after five officers were killed in dallas. The army officer targeted the officers in revenge for the unprovoked shootings in minnesota and louisiana. We begin in dallas with manual bojorquez. Reporter f. B. I. Teams spent saturday mapping a crime scene that extends over 20 square blocks, a painstaking process thats got parts of Downtown Dallas frozen nearly 48 hours after the attack. The ambush happened thursday night when this gunman opened fire on officers after a march protesting recent Police Shootings of black men. The gunman, 25yearold micah xavier johnson, an army veteran, targeted white officers in revenge. gunfire g was killed by police during a standoff. Today at a memorial for the fallen officers, mayor mike aywlings ur