This was done at a public school. They had a report from a mother that she thought her son was drinking while driving to school. Steming from that, they decided to search all the vehicles of the students parked on school property. They first searched vehicles without anyones prior knowledge that were unlocked. If they found an empty pack of cigarettes, or chew containers, they had the students come out open there trunks and glove compartments, and going thru there luggage that was in the trunk. This was done without consent or law enforcement present.