A two-month investigation led the Lyon County Sheriff’s Office to 3.8 pounds of marijuana, 7.6 grams of methamphetamine, prescription drugs and a gun after it served a search warrant Wednesday. Matthew McArthur, 36, of Fernley allegedly was selling drugs from the front bedroom window of a residence in the Villa Mobile Home Park, according to a news release from the Sheriff’s Office. A surveillance system hooked into a 50-inch TV allowed McArthur to monitor the front of the residence, along with the window he was allegedly selling drugs from, according to the Sheriff’s Office. He was arrested on suspicion of …