In 1995, Zhu Ling was poisoned by Thallium salt at Tsinghua University in China. The case was closed abruptly due to the political influence of a suspect's family. Some people involved are in US now:
Xue, Gang(薛刚), a cadre of the Chinese Communist Party, was involved in the cover-up of this heinous crime. He's in Amgen now. Li, HanLin(李含琳) was considered a accomplice and is in Vertex. They both in Pharm. companies and have access to toxic chemicals. Their criminal backgrounds are too dangerous for average law-abiding citizens to be around them.
We petition the government to investigate and revoke Mr. Xue and Mr. Li’s citizenship. Also reinforce background checks in Pharm. industry. The bottom line is: those who involved in murder by poisoning should be banned from Pharm.