I think most of us have seen the wounds on John's arms that look they are from an animal attack, not a car accident. (Although some people believe that shards of taillight could have caused them.)
But what doesn't get discussed much is the condition of the shirt John was wearing at the time of his death.
Look at those tiny holes in the below picture. They match up with the wounds on John's arms and they're only a few millimeters in diameter. Do they look like the sort of damage that could be caused by those large shards of taillight that the Commonwealth claims were found at the scene? I've damaged a lot of clothes over the years, and a large piece of polycarbonate might rip or cut, but it couldn't make these kinds of holes. It would take something long and thin to puncture the fabric. Maybe a claw or fang. Or perhaps something else, like a metal skewer. But not a piece of taillight.
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Edit -
Judge for yourself. Here's the reconstructed taillight that supposedly caused those tiny holes in his shirt.
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