Cops in California say they have arrested the girlfriend of a murder suspect after she broke into the home where he allegedly killed his wife and mother-in-law so she could destroy evidence.

The Contra Costa County District Attorney's Office said on Tuesday that it arrested 45-year-old Yan Wang on charges of accessory after the fact, residential burglary and destroying evidence . Prosecutors say she was in a romantic relationship with 43-year-old Howard Wang (no relation) who is accused of murdering his wife Linlin Guo and his mother-in-law Beimin Cheng.

Walnut Creek police first responded around 11:45 p.m. on Sept. 18 for a possible shooting at a home in the 100 block of Kelobra Court. Cops rushed to the home where they found Guo and Cheng dead. Detectives identified Howard Wang as the

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