A chemical engineer in California was caught on video poisoning his female co-worker.
David Xu, 41, a scientist at Berkeley Engineering and Research, had secretly been poisoning his colleague, Rong Yuan, with cadmium for nearly two years.
Cadmium is a toxic heavy metal. Yuan had suffered vomiting and hair loss for two years before discovering that her co-worker was poisoning her.
Rong Yuan saw countless doctors as her condition worsened.
One day, Yuan’s mother noticed an unusual odor coming from her daughter’s water bottle.
This prompted Yuan to set up a hidden camera at her desk, and that is when she caught Xu pouring the cadmium into her water bottle.
In 2019, Xu was charged with premeditated murder, but in a plea agreement, he pleaded guilty to poisoning, and he was sentenced to two years’ probation.
