Plants have the power to cure – and also kill. In this episode we hear how a spurned woman murdered her lover with just a mysterious plant substance. The Royal Botanic Gardens, Kew was instrumental in the race to identify the material, and how it was used, so to bring the killer to justice. James Wong hears how specialist plant knowledge uncovered the mystery from forensic samples, and a medical toxicologist shares the real challenges doctors face from plant toxins. Subscribe to Unearthed: Mysteries from an unseen world on your podcast app to get a new episode each fortnight. And you can share the show or join the conversation on social media with the hashtag #KewUnearthed. Follow @kewgardens for more insights into the magical, mysterious world of plants and fungi. www.kew.orgSee omnystudio.com/listener for privacy information.