It would be an accident. In our time, there won't be any family members of victims who would exact a little justice.
Hey, accidents happen all the time. Guy is leaving his house to take Fido for a walk and he accidentally trips down the stairs, breaking a leg and some ribs. Then, as he struggles to his feet, he gets tangled up in the dog leash and starts accidentally choking to death. He pulls out his pocket knife to cut away the leash, but then he accidentally slips again and falls on his knife. Fearful of an infected wound, he whips out his lighter to cauterize it but in the heat of the moment he cauterizes it too much and suffers third degree burns.
Accidents happen all the time.