The California Vehicle Code sets out "per se" blood alcohol content amounts that create a rebuttable presumption that a person's ability to drive is impaired and is DUI.  The legal limits are .08 percent for all drivers and .04 percent for commercial vehicle drivers.  If you were arrested for Alc...

Standardized Field Sobriety Tests (SFST) are used by law enforcement officers as an investigative tool to determine whether a driver is drunk or impaired in some manner.  SFST's are usually requested by the officer if the officer smells alcohol or observes some objective symptoms that the driver ...

Technology is beginning to play an important part in DUI investigations.  Many law enforcement officers have dashcam videos in their patrol vehicles.  The California Highway Patrol calls them MVARS, short for Mobile Video Audio Recording System.  The Los Angeles Police Department refers to them...

As we have discussed previously on our blog, law enforcement officers need reasonable suspicion to initiate a traffic stop upon a vehicle.  A driver who was speeding, weaving between lanes, rolling through a stop light or sign, driving with expired registration, talking on a cell phone, or textin...