>> i saw officers had their guns drawn. i pulled up on the curb and got the camera out. moments after all hell broke loose. >> collier is shooting at the officers in the street. rookie officer tim mcfarland in the foreground uses greg's car for cover. >> i see an officer across the street from me. i zoom in on him and i think i'm going to get him with his gun drawn, and i see he has his hands up to his throat and he has blood coming down his hands. >> it's mcfarland's partner officer jared slocumb. he's been shot in the left temple. the bullet traveled around his skull and exited the rear of his head. >> when i saw that he was shot, i was scared. i was, like, okay, i'm going to have to go get my partner because he's got go home tonight. crouching behind collier's white pickup truck, officer