Four people were arrested, and several others cited, after members of the Nevada County Sheriff’s Narcotics Task Force served a search warrant on a man and his son at a large “transient-style” camp off Deadmans Flat Road Friday. Jeff Warren was pulled over on a traffic stop on Loma Rica Drive in Grass Valley at about 1 p.m., said Sheriff’s Deputy John Dzioba. A search allegedly uncovered five baggies of methamphetamine totaling 2 to 3 grams; he also was allegedly under the influence of a controlled substance. Cheryl Lynn Jager, 46, who was a passenger in the vehicle, was arrested …