From Sfgate · · 50s
Berkeley engineer seeks record clearance after poisoning co-worker
Berkeley engineer wants criminal record cleared after poisoning co-worker with toxic water.
In brief
Berkeley engineer wants criminal record cleared after poisoning co-worker with toxic water. A Berkeley engineer convicted of poisoning his co-worker with cadmium wants his criminal record expunged after nearly eight years. Originally reported by Sfgate.
Berkeley engineer poisoned co-worker

A Berkeley engineer was caught on surveillance camera poisoning his co-worker with cadmium in 2019.
Conviction after eight years
David Xu, 41, was convicted of poisoning in 2019 and sentenced to two years probation in March 2024.
Toxic water levels found
Police found cadmium levels 3.5 million times the federal drinking water limit in Yuan’s water.
Health impacts documented
Rong Yuan documented seven years of medical complications from cadmium poisoning affecting herself and her parents.
Seeking record clearance
Xu wants his criminal record cleared after nearly eight years, fearing future employers will discover his conviction.
What to remember
A Berkeley engineer convicted of poisoning his co-worker with cadmium wants his criminal record expunged after nearly eight years.


