In this episode of “The Opportunist,” we explore the chilling case of David Xu, a seemingly ordinary engineer who attempted to poison his coworker with cadmium over a period of several months. We explore his twisted motives behind his actions and uncover the dark side of a workplace rivalry.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.