An Alpha man has been arrested on methamphetamine charges in Mercer County. Riley Adams was taken into custody on Friday. A Mercer County Sheriff’s Department report indicates deputies were dispatched to a report of a male subject passed out in a car in Sherrard. The person was later identified as Adams. He was wanted on an outstanding warrant from Rock Island County. Further investigation resulted in him being charged with possession of more than five grams of meth. He is being held in the Mercer County Jail awaiting a bond hearing.