http://www.nbcnews.com/news/us-news/...-black-n605686
"The snipers fired from an elevated positions on police officers minutes before 9 p.m. CT, according to Dallas Police Chief David Brown. He described the shootings as "ambush style."
"We believe that these suspects were positioning themselves in a way to triangulate on these officers from two different perches in garages in the downtown area, and planned to injure and kill as many law enforcement officers as they could," Brown said at a news conference — noting that some were shot in the back.
Police were in a standoff with one suspect in the second floor of a parking garage at around 12:30 a.m. and had exchanged gunfire with him, Brown said. Another suspect, a woman, was taken into custody near the garage, and two people seen leaving the area in a Mercedes were stopped and were being questioned."