security footage at the flying-j truck stop shows officer aaron zwicky pulling in behind a parked caran are getting back into it. officer zwicky decides to act quickly before they leave. zwicky asks the man to step out of the vehicle. >> he asked me, what did i do wrong? i told him, i need to speak to you. >> they walked to the trunk, where officer zwicky asks the man about a strange substance he's noticed on the bumper. >> he stayed calm. he said he didn't know what the substance was. after i heard somebody pounding on the inside of the trunk, i told him to open the trunk and he turned like he was going towards the lock to open the trunk. >> the man makes a move toward the trunk. officer zwicky tells the woman to stay put. suddenly the man lunges. >> that's when he started coming toward me and that's when i saw the knife. >> officer zwicky barely has time to react. >> he spun around and hit me on the left side of my neck. i pushed him away and started backpedaling away from him. i was able to draw my firearm and i fired five shots at him. just happened so quickly. >> the attacker lie