# Berkeley engineer seeks record clearance after poisoning co-worker

> Berkeley engineer wants criminal record cleared after poisoning co-worker with toxic water.
- Title: Berkeley engineer seeks record clearance after poisoning…
- Summary: Berkeley engineer wants criminal record cleared after poisoning co-worker with toxic water. A Berkeley engineer convicted of poisoning his co-worker with…
- Keywords: david xu, rong yuan, berkeley engineering, alameda county, cadmium poisoning, criminal record, poisoning case, news, local, Berkeley, engineer, seeks
- Source: Sfgate — https://sfgate.com/bayarea/article/poisoned-berkeley-co-worker-conviction-22474230.php
- Read time: 1 min
- Topics: david xu, rong yuan, berkeley engineering, alameda county, cadmium poisoning, criminal record, poisoning case, news, local
## 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.
## Key takeaway

A Berkeley engineer convicted of poisoning his co-worker with cadmium wants his criminal record expunged after nearly eight years.