@abc7newsbayarea: "Shocked. I don't know why.” Rong Yuan, a Berkeley engineer whose co-worker was convicted of poisoning her, is speaking publicly about the case for the first time after a court agreed to expunge the felony conviction of David Xu, despite objections from prosecutors. Yuan said she spent years trying to understand a series of unexplained health problems starting in 2017, including vomiting and hair loss, before discovering what she says was happening at her workplace. ABC7’s @drydenreports has the story. #davidxu #poison #berkeley #expunged #abc7news