"Kirkman is treating the driver like he deliberately murdered FLOTUS rather than it being a case of distracted driving that it apparently was. How the public will react to the purloined video is hard to predict. "
Well, but there's always an escalation of outrage depending on who the victim of something like this is. Drive distracted and kill some random adult? "That's terrible. He should go to jail." Drive distracted and kill a child? "That's horrible! He should go to jail for 40 years!" Drive distracted and kill a pregnant woman? "That's criminal! He should be charged with two counts of murder and get the chair!" Drive distracted and kill a law enforcement officer? Well, that may actually end up being a high level felony, depending on the circumstances.
So, in this case, driving distracted and killing a high profile public figure, a mother and FLOTUS to boot, public sentiment may be with Kirkman.