That's the gay panic defense. We have to specify because the police also commonly use a panic defense. Like when they shoot into a crowd and claim someone charged them. (Yes they did that, the NYPD, no they haven't released body cam footage yet, no nobody else is supporting their story)

Same basic logic as the cases where someone ties their victim to a bed, fetches some accelerant, douses them and sets them on fire in self defense.

Noooo don't do that, you're so pretty lol