This flashlight, also called a passive alcohol sensor, works much like a regular flashlight, providing light for officers who have stopped someone for a traffic violation. Here comes the controversial part: The device also senses alcohol. A sensor on the flashlight triggers a color-based measurement scale, which goes from red to green, depending on the amount of alcohol it picks up.
Proponents of the tool believe that these censored flashlights are a superior aid in the fight against DUIs. “It can be a vital tool in DUI enforcement when used properly,” said Livermore, Ca. police Lt. Mike Peretti, who has been using them for a couple of years. However, opponents like Michael Risher, a staff attorney with the American Civil Liberties Union of Northern California, said he worries this tool is violating people’s legal rights. Richer explains that California’s vehicle code requires a driver’s permission before taking a preliminary alcohol screening test. This is why a driver voluntarily blows into a hand-held device when stopped on suspicion on driving under the influence. Additionally, Richer explains that a designated driver could be stopped by officers with intoxicated passengers in the car, and the flashlight would still sense alcohol in the car — even when the driver is completely sober.