victim. According to one news report that I remembered having read around that time, the Thallium level in the girl's hair was off-chart in a measurement conducted by one researcher. That suggested a quite high dose ingested. Given that Zhu was living in campus dome with many other students more or less following same living style, if it was just an accident, I would expect several students being affected, not just one.

But for this case, my mind is clouded now. It is getting more confused each time somebody brings it up over the past two decades.