An 18 year old and his grandmother have been arrested after a drive by shooting in Waterloo, according to the Waterloo Cedar Falls Courier. Police were called to Logan Avenue around 12:15 Sunday afternoon on a report of a man chasing a woman with gun. When they arrived, Police say they witnessed Marshall Polk stick a 9mm handgun out of the window of a Chevrolet Equinox and fire one shot at 617 Logan Avenue. Polk was charged with Intimidation with a Weapon, Assault with a Weapon, Carrying Weapons, Interference While Armed and Possession of Marijuana. Polk’s 67 year old grandmother, Valerie Norman was driving the Equinox. She was charged with Intimidation and Interference. Another passenger ran away and remains at large.