What? She told her father she didn’t know him which caused him to think the boy had broken in and raped his daughter against her will. Think about that for a minute. Her LIE got that boy killed. SHE caused his death. The father thought he was protecting his daughter.
Protecting her from what? You don't know. Were they engaged in sex when the father came in? It doesn't say. Was the boy assaulting the girl? You have no idea if there was any reason for the father to think he was protecting her.