"So you're saying Gibson tripped the virus to draw us away, circled back to have a one-on-one with Tate. In plain view of the camera, mind you. Then, came back an hour and a half later to kill Tate, this time making sure to stay out of view. And for good measure, takes the body and steals one of our guns. Does that sound likely to you?"
"Maybe not, but I surely intend to find out."