'Being under the influence is about impairment'

Highway Patrol officers learn how to conduct sobriety testing at the CHP Academy in West Sacramento, including ways to detect how drivers are impaired by marijuana.
Highway Patrol officers learn how to conduct sobriety testing at the CHP Academy in West Sacramento, including ways to detect how drivers are impaired by marijuana.

Recreational marijuana is legal in California, but stoned driving is still hard to detect

January 21, 2018 03:55 AM