“The ACLU documents show the devices also give police the ability to look back in the past and perform a ‘convoy’ search to find vehicles that frequently travel together. A ‘cross search’ allows officers to create a list of vehicles that drove past a set of particular locations and times. This would, for example, isolate individuals that may be regular attendees at a political rallies or meetings. The ACLU report warned that this powerful tracking ability opens the door to abuse. The report found that US law enforcement agencies rarely place any limits on the use of ALPR. A New York police department says the use ‘is only limited by the officer’s imagination.’”
