In a rare move against the advance of license plate readers, Louisiana Governor Bobby Jindal (R) has vetoed a plan to acquire the scanners in the Bayou State. It had previously passed both houses of the Louisiana legislature overwhelmingly.
Many law enforcement agencies nationwide use these specialized cameras to scan cars and compare them at incredible speeds to a "hot list" of stolen or wanted vehicles. In some cases, that data is kept for weeks, months, or even years.
[Related]: Governor's Statement [louisiana.gov]
Senate Bill No. 250 [la.gov]