New Evidence Advances Extradition Proceedings for Zulma Guzman in Thallium Poisoning Case

Extradition proceedings are to begin in London concerning Colombian businesswoman Zulma Guzman Castro on November 2. Guzman, a former Shark Tank Colombia contestant, is accused of orchestrating the thallium poisoning of two schoolgirls and attempting to murder two others in April 2025. She is currently detained in a British prison and faces indictment for aggravated homicide, attempted homicide, and evidence tampering in Colombia.

The criminal inquiry centers on the delivery of chocolate-covered raspberries laced with thallium to the schoolgirls on April 3, 2025, which led to their severe toxicity and deaths. Prosecutors allege that Guzman had a longstanding relationship with Juan de Bedout, whose wife died in August 2021. They claim this relationship led to an obsession with the family and their preferences, ultimately resulting in the poisoning.

Guzman has been in British custody since late December 2025, after being rescued from the River Thames.