She claims she killed Mr O'Brien because he had threatened her and her daughter and told the court yesterday: "I had no choice." She told the court today how she returned home from the park still having no recollection of the death and she sent Amy upstairs to say goodbye to Mr O'Brien as she was leaving to visit her father. "I went upstairs calling his name and went into the bedroom and that is when I found him," she said. "I just screamed and screamed, my knees buckled and I actually fell to the floor.