Even if we assume that Tao Hsiao's girlfriend is a sociopath with no human emotions, hsi network and the community will keep reminding her that she was the trigger for his suicide. After five hours of shopping with his girlfriend at the Chinese mall in Xuzhou, he had had it. She hadn't. She berated him as a cheapskate. After all, it was Christmas.
Next, he threw the shopping bags over the railing and jumped the seven floors, reports the DAILY MAIL. Here is that article.
His suicide could well be interpreted as a form of homicide. He killed his girlfriend's reputation. If she isn't a total narcissist she will be emotionally broken for life. Many suicides are directed at others. In the process, the person seeking vengeance happens to die.