For years, police have relied on hand-held breath-testing machines as their main tool for determining whether a driver is impaired.
Critics have questioned the hand-held breathalyzer's accuracy and reliability almost from the beginning but the courts have upheld their use.
But the cop's key tool in pulling suspected drunk drivers off the road is under serious challenge in British Columbia, which led the country in stiffening impaired-driving laws.
A B.C. Supreme Court ruling this week undermined the way police can attest to the breathalyzer's accuracy.
CTV News reported the court determined a document known as the "Superintendent's Report on Approved Screening Devices" was inadmissible and an adjudicator who upheld a roadside driving prohibition imposed on a woman in February was wrong to rely on it.
Angela Lichun Buhr was pulled over around 2 a.m. and failed a breathalyzer test. The law allowsRead More »from Breathalyzer use under renewed attack in B.C. as critics challenge their accuracy