David Xu, 34, reportedly ran the metallurgy lab at the small company where he worked. He's accused of slipping toxic cadmium into a colleague's food and water over 18 months.
By Antonia Noori Farzan Antonia Noori Farzan Reporter for Morning Mix Email Bio Follow April 3 at 4:27 AM For months, Rong Yuan sensed that something was wrong at the engineering firm where she worked.
As Berkeleyside first reported, David Xu, 34, was arrested Thursday and has been charged with attempting to kill Yuan, his co-worker at the small Bay Area company. Authorities allege that over the course of 18 months, he repeatedly slipped toxic metals into her food and water, causing her to become seriously ill.
Police also took blood samples from Yuan and the two relatives who had fallen ill in November and December after drinking from her bottle. All three tested positive for elevated levels of cadmium, according to court papers. Xu and Yuan worked together at Berkeley Engineering and Research, which names 11 employees on its website and has yet to comment on the allegations. According to Berkeleyside, Xu was listed as the principal engineer before his arrest, when his résumé was scrubbed from the company’s site. He had worked there since 2009 and reportedly ran the company’s materials and metallurgy laboratory while also offering his services as an expert witness for trials.
Yuan, who could not be reached for comment late Tuesday, is described on the company’s website as an engineer with a PhD in materials science.
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