(CFP)

Zhu Ling, a former student of Tsinghua University in Beijing, has drawn renewed public attention recently. She fell ill in Tsinghua in December 1994. Later, doctors found that she had been poisoned with thallium.

She suffered permanent neurological damage because of the poisoning. Now 40, She remains paralyzed and nearly blind with diminished mental capacity. She is being cared for by her parents, who are in their 70s.

Her roommate in Tsinghua was investigated and subsequently cleared as a suspect in the case.

Zhu's case drew attention from the public again in April, when a graduate student at Fudan University in Shanghai died after prolonged exposure to N-Nitrosodimethylamine in a case in which his roommate was considered a suspect. The public is calling for a reinvestigation of Zhu's case and a clear response from the police.