Police say mom was killed by son after video game argument

CERES, Calif. — Police have arrested a Northern California man they say fatally shot his mother after an argument that erupted as he was playing a video game.Twenty-eight-year-old Matthew Nicholson of Ceres was arrested Thursday night on suspicion of murder. It's unclear whether he has an attorney.Police called to Nicholson's home found his 68-year-old mother with a head wound. She died at a hospital.Police said Lydia Nicholson went to check on her son in his bedroom after she heard him sh