Honestly I think your good friend may have involuntarely screwed himself when he shoot the sheep herder guy after he crashed. I think he should maybe get involuntary mansluaghter, and 5-10 years probation. If this took place at night, then perhaps the sheep herder charged your good friend after the crash, not being able to see that he had a gun. But that doesnt seem right, because of the relative distance the sheep herder guy is to the truck. Seems like your friend shot the sheep herder fella as soon as he got out of the vehicle. Now this isnt entirely out of contense to shot someone for stealing your truck,and knocking you upside the head a few good ones while your very inebriated, but he is pleading that he shoot the sheepherder in self-defense, which is the wrong plea. However in some states, you can use lethal force if nessecary, to protect yourself and your property, which would include a vehicle. Your good friends alcohol level was 1.6 which is very high up there, and with a few knocks on the head, probably clouded his good judgement to some degree i would imagine, so he should change his plea, seek a plea to involuntary mansluaghter in exchange for 5-10 years probation, which in this situation, should be acceptable to a prosecuter with any sense to know that this is a case of two very intoxicated individuals, the sheep herder the obvious criminal, and the good friend with a clouded judgement and a few poors decisions. It is a case of one bad night, and not cold blooded murder, and that warrents involuntary mansluaghter IMO.