Lundborn was at the McDonalds restaurant on North Street yesterday when police say he failed a field sobriety test.
Police said, Lundborn had an open container of alcohol in the SUV he was driving. In addition, his young child was in the vehicle.
Police responded after to a report that an intoxicated person was operating the vehicle.
Lundborn resigned his position as Truro Chief in November of 2011, at the time pleading guilty to driving under the influence after a crash in a police cruiser.