A Grass Valley woman and one of her sons were arrested by narcotics detectives Thursday night, and another son was being sought in connection with outstanding warrants. Members of the Nevada County Sheriff’s Narcotics Task Force and Grass Valley Police officers served a search warrant on the Primrose Lane residence of Dianna Paulette Boyce, 57, said Sheriff Keith Royal. They allegedly located 12 pre-packaged bags of methamphetamine totaling 20 net grams with an estimated street value of $1,600. Dianna Boyce was arrested on suspicion of possessing a controlled substance, transporting a controlled substance for sale, and being under the influence …