After separating from her husband Monty had moved in with her daughter Judy and Judys husband, Bob Lulham. The sensational trial revealed that Lulham and Monty had an "intimate relationship" while Lulhams wife was at Sunday mass. Monty was found not guilty; Judy Lulham divorced her husband as a result of the revelations about his affair and Monty killed herself with thallium in 1955. In July 1953, Sydney woman Beryl Hague was tried for "maliciously administering thallium and endangering her husbands life". Hague confessed to buying Thall-rat from a corner shop and putting it in her husbands tea because she wanted to "give him a headache to repay the many headaches he had given me" in violent disputes. In 1953 Australian Caroline Grills was sentenced to life in prison after three family members and a close family friend died. Authorities found thallium in tea that she had given to two other family members. Grills spent the rest of her life in Sydneys Long Bay Gaol, where fellow inmates dubbed her "Aunt Thally".The Australian TV documentary Recipe for Murder, released in 2011, examined three of the most sensational and widely reported Australian thallium poisonings, the Fletcher, Monty and Grills cases. Others
Félix-Roland Moumié, a Cameroonian leader, was assassinated with thallium in Geneva on 3 November 1960 by a former agent of the SDECE (French secret service) probably at the request of Cameroonian authorities.
Her relatives received prison terms, the parents dying in jail. In 1988, members of the Carr family from Alturas, Polk County, Florida, fell ill from what appeared to be thallium poisoning. Peggy Carr, the mother, died slowly and painfully from the poison. Her son and stepson were critically ill but eventually recovered. The Carrs neighbor, chemist George J. Trepal, was convicted of murdering Mrs. Carr and attempting to murder her family, and sentenced to death. The thallium was slipped into bottles of Coca-Cola at the Carr and Trepal homes. Thallium was the poison of choice for Saddam Hussein to use on dissidents, which even allowed for them to emigrate before dying. In 1995, Zhu Ling was the victim of an unsolved attempted thallium poisoning in Beijing, China. In 1994, Zhu Ling was a sophomore studying physical chemistry at Tsinghua University in Beijing. She began to show strange and debilitating symptoms at the end of 1994, when she reported experiencing acute stomach pain and extensive hair loss. Ultimately she was diagnosed on Usenet with poisoning by thallium. To this day, there is still speculation among Chinese expatriates overseas as to the poisoners identity. The only suspect of the police investigation, Sun Wei, is a member of a family with high-level political connections, which may have been used to halt and suppress the results of the investigation. Sun Wei was Zhu Lings classmate and roommate in Tsinghua University from 1992–1997. Tsinghua University also said she was the only student who had access to thallium compounds at the school.