Then they opened fire. Harris carried a 9mm High Point carbine, Klebold the TEC-DC9 semiautomatic pistol. Both had sawed-off shotguns strapped to their weapons belts. Harris killed Rachel Scott and Daniel Rohrbough as they sat outside the school and shot randomly at others. Together, he and Klebold wounded six students outside.
Police believe they participated equally in the killings.
One of the two shed his duster coat outside, leading witnesses to tell police that they believed there was a third gunman in a white T-shirt. Klebold shot teacher Patty Nielson and student Brian Anderson through the west doors. He and Harris had a brief exchange of gunfire with two police officers outside, then entered the west doors, where teacher Dave Sanders was hurrying down the hallway toward the library. As Sanders turned to flee, they shot him in the back twice, then entered the library and began shooting randomly at students. Kyle Velasquez was killed first.