I think my girlfriend may have killed a man

So my girlfriend was raped by a man with a knife when she was 17 years old, about 2 years ago now. She was 17, he was 29, she was at her best friends house when he just showed up, and raped her. She was really upset and I did my best to help her cope.<br><br>But I recently found out what actually happened. The police never found out what happened because she didn't press charges, but he's dead now.<br><br>The story is, they were at her best friends house, she had a knife in her pocket, which was normal. She was upset and the guy was getting close to her, so she stabbed him with her pocket knife. She didn't remember doing it, and just thought she was stabbed.<br><br>But apparently she was stabbed, he died and she left the house. She didn't tell me any of this, and I found out a couple days ago from the police. They were looking for information about this case, and my girlfriend was a witness, so they were contacting her again.<br><br>So I asked her if she knew anything, and she said that she didn't know how to tell me. She was terrified that the police were going to put her in jail. I asked her to tell me everything, and she said that the guy got too close to her, and she just stabbed him. He was stabbed in the chest, and he died within a few days.<br><br>I'm scared, I'm scared that she'll do that to me, I'm scared that she's dangerous. I don't want to leave her, but I don't know if I want to be around her anymore. I don't want to be around her, but I also don't want to give her up. I want to talk to her, I want to try and get her to see that she can't do this again. She's not a bad person, I know that. I just don't know what to do.<br><br>TLDR: my girlfriend raped and killed a man 2 years ago, and she didn't even remember doing it.