Why was it legal to kill Nehor? Alma 1:13

Why was it legal to kill Nehor? Alma 1:13

Answer:
Nehor killed Gideon. This society enforced capital punishment. See Alma 1:14.

I don't have strong feelings about the death penalty, either for or against. It makes sense. It's gruesome. It's pretty evil if the person didn't deserve it. The racial component in my country is disturbing. Mostly: I don't have enough information, so like most political topics, I just reserve judgment until later. I read a pretty sad book about it in High School. And that's the extent of my commentary on that.