How do officers working for Los Angeles Police Department (LAPD) determine whether they should stop someone for a DUI?
All LAPD officers receive substantial training that helps them understand what to look for when patrolling L.A.’s freeways and surface streets for dangerous drivers—and drivers who might be under the influence. Police officers are human, however, so they can forget what they learned (or just ignore proper procedure) and make errors during the arrest process itself.
LAPD officers’ DUI training has changed considerably over the decades, according to the department’s website. Back in the 1970s, police departments in most jurisdictions, including Los Angeles, had no standards-based roadside sobriety tests to help them determine and document whether or not a person was driving while under the influence of alcohol. So different states (and different officers) developed their own versions of the sobriety tests.