Seven years ago, Hector Black's daughter was murdered after she surprised an intruder in her Atlanta home.
"We learned about what had happened in bits and pieces," Black says.
Patricia Ann Nuckles had come home, where her attacker was hiding in a closet, hoping to jump out the back window and escape. But she opened the closet door and fell backwards. The man tied her hands behind her back, Black says.
Nuckles told the man that he needed to get help with his drug habit, her father says. Her captor gave her advice about how to prevent a burglary.
"He asked her for sex and she said, 'You'll have to kill me first.' And so he did," Black says.
"We were all just devastated. Nothing like this had ever happened. I mean, we'd known death, but not like this.
"I'd never been in favor of the death penalty, but I wanted that man to hurt the way he had hurt her. I wanted him to hurt the way I was hurting."
Black says he wanted to know "what kind of a monster would do a thing like this."