A suspected arsonist pleaded not guilty Wednesday to two garage fires in Zanesville. According to Muskingum County Prosecutor, Mike Haddox, 21-year-old Russell Tanner was arraigned on two counts of arson. Tanner is a suspect in a garage fire on March 11th at 718 Lexington Ave. and another garage fire on March 24th at 736 Fountain Square. If convicted, Tanner faces up to 36 months in prison. He is being held on $10, 000 bond.