Dallas Shootings: Police Investigation

Law enforcement personnel continue probing for details into Thursday’s ambush of police officers at a demonstration in Dallas, Texas, July 9, 2016. (G. Tobias/VOA News)

FBI investigators search for evidence in the July 7 sniper attack on police officers in downtown Dallas, Texas, July 9, 2016. (G. Tobias/VOA News)

Law enforcement personnel investigate a mass shooting scene after an attack that killed and wounded Dallas police officers, in Dallas, Texas, July 8, 2016.

Law enforcement personnel investigate a mass shooting scene after an attack that killed and wounded Dallas police officers, in Dallas, Texas, July 8, 2016.

Law enforcement personnel investigate a mass shooting scene after an attack that killed and wounded Dallas police officers, in Dallas, Texas, July 8, 2016.