A hair was found on the rear panel of the Lexus and tested to be consistent by mitochondrial DNA (95% confidence). The DNA found on the tail light housing was tissue residue and tested by nuclear DNA method to extreme confidence to match JOK.
As a matter of common sense, IMO, there is no specific level of vehicle damage that corresponds to "fatal strike" when the the fatal strike isn't with the vehicle itself but with a hard surface contacted by the back of the skull.
The prosecution is alleging more than a time window consistent with JOK's being struck. It will present data from the Lexus's own tracking information indicating the vehicle reversing for a significant distance at high speed. It will also present data from JOK's phone alleged to be consistent with JOK remaining in the same spot at which he exited KR's vehicle, for the rest of the night, on top of his phone.
The tail light pieces, though, are the case, IMO. If the snowstorm hadn't come along to bury them, the train of events we have witnessed would never have gotten rolling, because there would never have been a serious effort to deny the most evident significance of those pieces.
