Zhu Ling, 50, was poisoned with the highly toxic thallium in 1994 but no-one was ever convicted.
Source: Zhu Ling: Woman dies decades after unsolved China poisoning
Zhu Ling, 50, was poisoned with the highly toxic thallium in 1994 but no-one was ever convicted.
Source: Zhu Ling: Woman dies decades after unsolved China poisoning