Self-defense claims are always convenient when there is no one left to tell the other side of the story.
A reading from Genesis 4:23
And Lamech said unto his wives, Adah and Zillah, Hear my voice; ye wives of Lamech, hearken unto my speech: for I have slain a man to my wounding, and a young man to my hurt. {I have...: or, I would slay a man in my wound, etc.} {to my hurt: or, in my hurt}
— Genesis 4:23 (en_kjv)
https://peck.to/tx/faf54ddeae0682eae3fd799cb14ef234d5cfa04ebf063c1bbffe7b975216a024
Hear my voice, for the bill is my hurt.