In Cincinnati, prosecutors turned time and again to the body-camera footage gathered by Tensing when he stopped DuBose on a summer evening after noticing a missing licence plate.
But the footage was jerky and blurred, and prosecutors had to slow it down, with the aid of a forensic expert, in their effort to counter Tensing's contention that his arm had felt stuck in the steering wheel and that he had shot DuBose because he believed he was going to be dragged by the car.
"There was no danger to Ray Tensing when he made the decision to go for his gun," Tieger said.
Indeed, the video had contradicted Tensing's initial claim that his arm had been caught in the steering wheel.
The snail instinctively anchors itself in place by tensing the muscular "foot" running along the underside of its body.
After the snail has learned, "the same light then gives you a different response" in the form of foot tensing, explains Crow.