Due to the recent poisoning case at Shanghai's Fudan University, Chinese netizens have taken renewed interest in another well-known university poisoning from 20 years ago. In 1994, Tsinghua University chemistry student Zhu Ling was nearly killed and permanently paralyzed due to thallium poisoning. Although cleared from charges, her roommate Sun Wei remains a suspect to many due to her family's high-level political connections. Netizens have taken not only to Weibo (which has subsequently dropped searches for terms related to the case), but also started a White House petition asking that Sun Wei be deported back to China. NEW REPUBLIC has more details.