Why would someone leaving a driveway be cause for endangering life or inflicting serious physical injury? There has been no reason given that the individual was dangerous to the public if not "arrested without delay".  

Keep in mind that AS11.81.371(a) requires that the officer "reasonably believes" the individual may endanger life or inflict serious physical injury.  No evidence has been given that the officer(s) had any belief that the individual was an immediate danger to the public.

If in fact the officer(s) had "reasonable belief" he might endanger life or inflict serious physical injury, the basis for that reasonable belief should be made public.  

If the officers are claiming self defense (most likely) the basis for the use of lethal force in self defense should be public.