Exodous 21:12-13
He who strikes a man so that he dies shall surely be put to death. But if he did not lie in wait for him, but God let him fall into his hand, then I will appoint you a place to which he may flee.
Exodous 22:2
If the thief is caught while breaking in and is struck so that he dies, there will be no bloodguiltiness on his account.
Hmmm..well, that's accidental and defense of property at least. I hope that helps with your homework.