In the Zhu Ling poisoning case, the victim's parents tried their best to find the truth and try to expose the real culprit. Although Zhu Ling's roommate Sun Wei was once regarded as an important suspect because she had the unique conditions to contact thallium and poison her, in the end, there was no conclusive evidence and the case could not be conclusive.
It is reported that before ** brought Sun Wei into sight, there was a theft in their dormitory, which led to the loss of Sun Wei's personal belongings, which also brought complexity to the detection of the case. Sun Wei not only has a good family background, but is also a talented student at Tsinghua University, and her current life in Australia seems to be quite smooth, focusing on the interior decoration business and enjoying a carefree life.
A netizen who claimed to be Sun Wei's ex-boyfriend once posted a long post on the Internet, sharing his views on the whole incident and a description of Sun Wei's character, mentioning the mentality of "if you don't get it, you will destroy it". Sun Wei was eventually freed from suspicion, not only because of the lack of evidence caused by the theft, but also because her brother had entered the Tsinghua University laboratory alone with a camera and removed the lab's items, thus showing that Sun Wei was not the only person who had access to thallium.
With the passage of time and the death of Zhu Ling, these controversies surrounding the case gradually faded out of public view and were buried by time.