According to papers filed in court Thursday by the Contra Costa District Attorney’s office, the 18-year-old Concord teen who called police telling them he had killed his mother on Wednesday, Feb. 5, 2020 has been identified as Harrison William Mercier. He is charged with the murder of Elizabeth A. Barry. (See related article)
The filing papers allege Mercier used a knife to kill Barry and that it was premeditated, with “malice aforethought”. Complaint Mercier February 6 2020
According to Concord Police press release, on February 5th, at approximately 9:00 PM, Mercier called Concord Police Dispatch saying he had just killed his mother at their home located in the 3000 block of Treat Blvd. When Officers arrived, the man was outside waiting for them. His mother was found deceased inside the home. Mercier was arrested and CPD Detectives are currently investigating the case.
Anyone with information regarding this case may contact Detective Greg Mahan with CPD’s Major Crime Unit at 925-603-5817. CPD Case #20-1552