A California chemical engineer, David Xu, who pleaded no contest to poisoning a colleague, was captured on hidden-camera footage allegedly tampering with her water bottle with a toxic heavy metal, cadmium. Xu, a metallurgist at Berkeley Engineering and Research, poisoned his colleague, Rong Yuan, through her food and drinking water for nearly 18 months between Read More: https://punchng.com/us-engineer-caught-on-camera-poisoning-colleagues-water-bottle/
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