No such thing as "accidental murder" but if a lorry driver is drunk,speeding, chatting on a mobile, has fiddled the tacho or knowingly taken an unsafe, illegal vehicle on the roads it is no more an "accident" than a death caused by firing a gun along a crowded high street.
I disagree. I think there needs to be a distinction between those cases where someone made a mistake which happened to result in a death/injury, those situations where someone did something reckless, but not intending to put someone in danger, but which resulted in a death/injury, and those cases where someone was deliberately trying to cause death/injury.
It is important to consider the mindset of the perpetrator, not just the final outcome, as the ultimate future threat to the public is dependent on that mindset.