Provincial police are investigating a series of mischiefs over the span of a month in Midland. Southern Georgian Bay OPP say windows at three homes on Norman Crescent were damaged by stones – one home on July 20 and two others on Aug. 27. All incidents happened between 3-3:30 a.m. Nearby residents are being asked to check their video surveillance systems for any suspicious activity at the time of occurrence. Anyone with information is asked to contact police at 1-888-310-1122 or Crime Stoppers at 1-800-222-8477.