He also stole money from her, but the point is he still committed a serious crime - breaking and entering and he is a thief. How are you saying those things aren’t crimes?
Can’t understand why the good-hearted teacher would just open her door to anyone, especially when she lived alone and it was late at night? You should never open your door just like that, regardless the time of day or whether you lived alone. Also can’t understand why she didn’t even bother changing her locks. Anyone could’ve copied her keys, not just her next door neighbor. Guess she was too kind and too trusting and never paid any attention to her own personal safety. The neighbor that heard the fighting should’ve called police immediately. Perhaps that’s not the culture in Taiwan, but in the US, neighbors would call the police when they hear what she heard. What a tragic case, my heart aches for her poor parents.