There is no way to compensate or punish someone for murder, it simply means forfeiture of one's own life.

谋杀者没有办法补偿或者受罚，只能以自己的生命为代价。

耶鲁公开课 - 旧约导论课程节选

You can kill him. You can certainly kill someone who comes after you, who tries to murder you.

你可以杀了他，你可以理所当然地,杀死一个跟踪你，想谋害你的人。

耶鲁公开课 - 公正课程节选