Ultimately, BL is the only one who is to blame. If she had no visible marks and he did, they were placed in a difficult position, despite the witness account, I guess. I do wish she had been arrested, however, if they believed that was their only choice. Because it may have caused her to realize the ramifications of being in an abusive relationship. And possibly allowed her to get the hell out. Finally, if he had been hitting her first, she could have used self-defense as a defense to any charge. I hate the what ifs.