Perhaps not equivocation, but we’re using the word in different ways. You’re taking the word “accident” to mean “an event that arose through no one’s fault.” I’m just using the word “accident” to mean simply “car wreck” irrespective of fault, intent or motive, as in “the driver intentionally caused an accident.” Incidentally, dctionary dot com had a third definition:
“c. An instance of involuntary urination or defecation in one’s clothing” 
At any rate, I take it by your post that you think intent is irrelevant and that both should be treated the same, since punishing a motive is punishing them for their evil. I disagree. Motive can be indicative of whether a person presents a continuing danger to society, and thus merits a greater punishment. Somebody who negligently causes someone’s death may never present such a danger again, whereas somebody who tortures someone to death almost certainly will. Just for clarification, by the way when you say both owe “life”, do you mean anyone who causes the death of another should spend their life in prison, or do you mean that because they took a life their life is now forfeit, i.e. death penalty?
Also: if I understand you, intent and motive is irrelevant, and the punishment should be weighed solely by the harm caused. Should someone who steals because they and their family are starving be treated the same as someone who steals for gain? Should someone who steals a medicine to save the life of their spouse be treated the same as someone who steals the same medicine to sell on the black market?
