Police officer observes client swaying and staggering on sidewalk in vicinity of local bar at 1:00 a.m. Weather is cold with ice and snow on ground. Officer decides to circle block to pick up client and drive him home. Officer sees client behind wheel of truck exiting parking garage but continues by and allows truck to exit. Officer runs registration plate through cruiser on board computer to confirm ownership as truck continues on with no erratic operation or equipment violations. Subsequent stop of vehicle deemed illegal when observations only gave rise to mere suspicion or hunch that driver was impaired by alcohol. Pre-trial Motion to Suppress allowed.