Overview

• Contra Costa County prosecutors charged Yan Wang, 45, of Oakland, with felony accessory after the fact, first-degree burglary, and misdemeanor evidence destruction, and she was arraigned Tuesday.
• Prosecutors allege she destroyed cellphones on the day of the killings and entered the couple’s home the next day to remove evidence.
• Howard Wang, 43, has been charged with two counts of murder in the deaths of his wife, Linlin Guo, and mother-in-law, Beimin Cheng, inside the family’s Kelobra Court home.
• Authorities say he slashed both victims’ throats, fired two shots, and falsely claimed he had shot at a fleeing intruder.
• He is scheduled for arraignment Friday in Martinez, faces life in prison without the possibility of parole if convicted, and also faces counts of criminal threats and witness tampering.