RCMP in the Northwest Territories have begun using roadside cannabis-screening technology that has faced criticism from defence lawyers elsewhere in Canada.
Mounties in the territory announced late last month that they had deployed devices designed to take a saliva sample and test for the presence of tetrahydrocannabinol, also known as THC, the main psychoactive substance in cannabis. They said the technology would help them detect impaired drivers and make roads safer.
But some criminal defence lawyers have raised concerns about these devices' ability to deliver reliable test results, particularly in cold temperatures. They argue the technology isn’t effective at determining whether someone is impaired.
“It can lead to people being arrested who are actually innocent,” said Kyla Lee, a lawyer based in Vancouver.
Lee said research has shown the devices may be more likely to deliver false results in extreme cold temperatures, and movement during analysis could also affect outcomes. She added that while the devices can deliver either a positive or negative test result, they do not indicate how much THC may be in a person’s bloodstream.
Lee recently represented a Nova Scotia woman in a constitutional challenge of the law that allows for roadside drug testing technology in Canada.
Michelle Gray, who uses cannabis for multiple sclerosis, had her car impounded and her licence suspended for a week after she failed a cannabis saliva test at a roadside checkpoint in 2019, even though she passed a sobriety test that same night.
“The technology just doesn’t exist yet to allow police to make a determination of impairment via drugs using physical equipment,” Lee said.
Lee is awaiting a decision on the constitutional challenge in Nova Scotia. She said she expects there will be further court challenges in other Canadian jurisdictions where these devices are used, including the Northwest Territories.
There are two devices approved for roadside cannabis screening in Canada: the Drager DrugTest 5000 and the Abbott SoToxa mobile test system. The companies that manufacture the devices recommend they be used in temperatures no lower than 4 C and 5 C, respectively.
Cpl. Andree Sieber of the Regina Police Service, which began using roadside devices to detect cannabis use in early 2020, said officers bring drivers to their vehicles for testing to prevent issues with weather conditions or temperatures.
“We’ve used it throughout all seasons here in Regina,” she said. “We have very cold winters and some pretty nasty, snowy cold days and you have the person attend back to your vehicle with you where it’s heated and it’s not an issue.”
Sieber said the more THC a person has consumed, the more likely they are to show signs of impairment and to test positive.
The RCMP said roadside screening devices are just one tool they use to detect and investigate drug-impaired drivers alongside officers’ observations. They said field sobriety testing and drug recognition experts remain the primary enforcement tools.
“Police officers rely on what they see and hear, as well as what they smell when investigating impaired drivers,” the RCMP said in a written statement. “Regardless of how a drug is consumed, there are signs of that consumption and police are trained to recognized them.”
This report by The Canadian Press was first published Aug. 13, 2022.
This story was produced with the financial assistance of the Meta and Canadian Press News Fellowship.
U.S. president-elect Donald Trump has nominated former diplomat and U.S. congressman Pete Hoekstra to be the American ambassador to Canada.
A group of researchers say they have more evidence to suggest the COVID-19 pandemic started in a Chinese seafood market where it spread from infected animals to humans. The evidence is laid out in a recent study published in Cell, a scientific journal, nearly five years after the first known COVID-19 outbreak.
The average salary needed to buy a home keeps inching down in cities across Canada, according to the latest data.
A London father and son they’re shocked and confused after their home was riddled with bullets while young children were sleeping inside.
Police in Peru have arrested a man caught trying to leave the country with 320 tarantulas, 110 centipedes and nine bullet ants strapped to his body.
Prime Minister Justin Trudeau has announced embattled minister Randy Boissonnault is out of cabinet.
A four-month-old baby is dead after what Toronto police are calling a “suspicious incident” at a Toronto Community Housing building in the city’s midtown area on Wednesday afternoon.
A Saskatchewan woman who refused to provide a breath sample after being stopped by police in Regina did not break the law – as the officer's request was deemed not lawful given the circumstances.
The families of the victims of Paul Bernardo will be allowed to attend the serial killer’s upcoming parole hearing in person, the Parole Board of Canada (PBC) says.
Several thousand British Columbians remain in the dark Wednesday morning after a windstorm known as a bomb cyclone slammed coastal communities.
A UBC instructor is facing backlash following the release of a 12-minute audio file from a lecture she gave on Sept. 18.
The clean up was well underway Wednesday on Vancouver Island after a night of chaos.
A four-month-old baby is dead after what Toronto police are calling a “suspicious incident” at a Toronto Community Housing building in the city’s midtown area on Wednesday afternoon.
A Markham hockey buff who built a massive backyard ice rink without permissions or permits has reluctantly agreed to remove the sprawling surface, following a years-long dispute with the city and his neighbours.
Toronto is looking to retrofit its heavy-duty vehicles with side guards in an effort to reduce pedestrian deaths.
The Calgary Zoo says its two-year-old western lowland gorilla named Eyare died after being hit by a hydraulic door at the rear of the exhibit.
There is quite the buzz around the small southern Alberta town of Nanton over its fall stage production, and for more reasons than one.
Calgary police are seeking public assistance in relation to a Tuesday fire in Hillhurst that they believe was deliberately set.
The consortium responsible for building Ottawa's new north-south line, TransitNext, says it is ready for the City of Ottawa to begin the final phase of approvals before opening the line to the public.
Thirty-nine new photo radar cameras will be installed to keep an eye on Ottawa roads over the next 14 months, including on roads in the rural villages of Dunrobin, Manotick, Richmond and Vars.
One of Canada's premier high-end gym chains is set to open in Ottawa on Wednesday.
Facing criticism for requiring health care workers with two jobs within the public system to choose one to comply with labour laws, Santé Québec has announced a one-year extension to the transition period.
A family in Rosemont-La-Petite-Patrie is facing an emotional upheaval as the STM moves forward with expropriating their home for a new mechanical ventilation station to serve the Orange Line.
A Saint-Sauveur couple was back in court on Wednesday, accused of attacking a teenager over a prank.
As we head into the holiday season, one Edmonton small business owner says she's shutting down online orders – something not all businesses may be able to do
Former prime minister Stephen Harper is the new chairman of the Alberta Investment Management Corporation, or AIMCo, which oversees more than $160 billion in funds, including pension funds and the Heritage Savings Trust Fund.
Dale McFee will retire as head of the Edmonton Police Service (EPS) on Feb. 21, the Edmonton Police Commission said in an email on Wednesday.
A school bus hit parked vehicles and pushed one into a Middle Sackville, N.S., home Wednesday afternoon.
A 19-year-old is facing charges after video of him allegedly driving close to 200 km/h while holding alcohol was shared on social media in the Yarmouth, N.S., area.
The RCMP in Nova Scotia is searching for a man wanted on a provincewide warrant following an incident in North Preston.
A Winnipeg woman is warning others to be on guard after she was nearly duped by an elaborate scam involving fake Manitoba Hydro workers, Bitcoin machines, and a “frightening” amount of her own personal information.
Illegal cigarettes in Manitoba are taking a big chunk out of the market.
A recent drop in river levels is turning back the pages of time in Winnipeg and opening the doors to a hobby that is attracting people who aren’t afraid to get their feet wet and their hands dirty with an interest in Manitoba history, also known as mudlarking.
Former Saskatchewan Party MLA Greg Lawrence has been sentenced to 12 months probation – after pleading guilty to one count of assault.
A Saskatchewan woman who refused to provide a breath sample after being stopped by police in Regina did not break the law – as the officer's request was deemed not lawful given the circumstances.
Many commuters in and outside of Regina are facing tough driving conditions Wednesday morning following a significant snowfall on Tuesday that has closed highways and snarled traffic on many of the city's main throughfares.
A man who plead guilty to a double stabbing in 2015 will soon be out on statutory release, but he'll have to follow some strict conditions set out by the parole board.
The Waterloo Regional Police Service presented their 2025 budget, totaling $252.5 million, to the Region of Waterloo’s Strategic Planning and Budget Committee on Wednesday morning.
The families of the victims of Paul Bernardo will be allowed to attend the serial killer’s upcoming parole hearing in person, the Parole Board of Canada (PBC) says.
A 15-year-old girl who was set on fire at a Saskatoon high school earlier this fall is still recovering in hospital.
A Saskatoon teen accused of driving a car involved in a high-speed crash that killed a 16-year-old last spring has pleaded guilty to his charges.
Former Saskatchewan Party MLA Greg Lawrence has been sentenced to 12 months probation – after pleading guilty to one count of assault.
The owner at a North Bay rental home has been fined and seven people displaced after a kitchen fire Tuesday.
Next week, Sudbury city council will decide how to rehabilitate the College Street underpass, which was built in 1949.
A Canadian Taylor Swift fan has some 'Bad Blood' with the Calgary International Airport after security staff confiscated hundreds of dollars worth of beads she was going to use to make friendship bracelets.
A London father and son they’re shocked and confused after their home was riddled with bullets while young children were sleeping inside.
They were raising a glass to a new business in St. Clair Township, but now it appears the cap has to go back on the bottle.
Back in July, Nicolas Lemke plead guilty to impaired driving causing the death of Aiden Curtis, and impaired driving causing bodily harm to two other adults who were injured.
Several apparent homemade explosive devices were found inside an RV where an allegedly armed man had barricaded himself for 16 hours, forcing evacuations in the north end of Barrie, police said.
Weeks after more than a dozen mayors, including Barrie mayor Alex Nuttall, signed a letter to Premier Doug Ford asking him to consider using the notwithstanding clause as cities struggle with how to handle growing encampments, a coalition of councillors are speaking out against its potential use.
With some milder winters in recent years Barrie city councillors are exploring if there's an appetite to dine outdoors in the coldest months of the year.
*WARNING: This story contains graphic content that some may find disturbing. Reader's discretion is advised.*
Town of Essex councillors have voted not to move ahead with a hiring freeze meant to tackle a six per cent tax levy increase that is currently on the table.
A Kingsville family, who for years put up elaborate Christmas lights and decor outside their home on Marshwoods Boulevard, has instead put up a for sale sign this year.
The clean up was well underway Wednesday on Vancouver Island after a night of chaos.
Several thousand British Columbians remain in the dark Wednesday morning after a windstorm known as a bomb cyclone slammed coastal communities.
One person is unaccounted for after a fire that destroyed a home in Nanaimo's south end Wednesday morning.
Police are appealing for information on a targeted shooting that resulted in the hospitalization of a man in Kamloops.
British Columbia's independent police watchdog has cleared officers of wrongdoing in a crash where three people were killed south of Kamloops in July of last year.
A B.C. woman who stole more than $14,000 in volunteer-raised funds that were supposed to be spent on school supplies and programs – including hot meals for vulnerable kids – won't spend any time in jail.
There’s a new way to give this holiday season.
Lethbridge police say four teenagers have been arrested in connection with an autumn attack that saw a 16-year-old badly injured.
Some Lethbridge residents will be heading to the polls next month to elect their next MLA. The Government of Alberta announced the Lethbridge-West byelection will take place on Dec. 18.
Students in Sault College’s business accounting program have a new learning pathway that will ultimately give them a head start to a career.
The Transport Safety Board of Canada says the crew of a Porter Airlines flight landing in Sault Ste. Marie in April 2023 didn't realize the plane was so far down the runway.
The owner at a North Bay rental home has been fined and seven people displaced after a kitchen fire Tuesday.
An international group led by a Canadian is in Rome this week to push the Catholic Church to adopt a zero-tolerance policy on abuse by clergy.
A company hoping to build a multi-billion-dollar wind-to-hydrogen project in western Newfoundland is eyeing other options as Canada's plans to supply Europe with green energy have not yet materialized.
The four women sipping tea around an antique wooden table in rural Newfoundland said they weren't looking for much in a mate: kindness, humour, a good sense of fun and, ideally, a full set of teeth.
After driving near the water that winter day, Brian Lavery thought he saw a dog splashing in the waves – then realized it was way too cold for that.
Toronto radio and podcast host Jax Irwin has recently gone viral for videos of her cute -- and at times confusing -- phone conversations.
Two young women from New Brunswick have won one of the most prestigious and sought-after academic honours in the world.
Stretching 3,000 kilometres from the tip of New Zealand to its southernmost point, with just a bicycle for transport and a tent to call home, bikepacking event Tour Aotearoa is not for the faint of heart.
When he first moved to his urban neighbourhood, Barry Devonald was surprised to be welcomed by a whole flock of new neighbours.
When George Arcioni began renovating his kitchen last summer, he didn’t expect to find a stack of letters hidden in the wall behind his oven.
A Nova Scotia couple fulfilled their wildest dreams Thursday night when they got engaged at Taylor Swift’s Eras Tour in Toronto.
Some Calgary residents caught what appeared to be a meteor streaking across the sky early on Wednesday morning.
Four years ago, Phill Hebb started up 'Phil’s Unique Birdhouses' and since then, they’ve made their way all across Canada and into the United States.
Prime Minister Justin Trudeau has announced embattled minister Randy Boissonnault is out of cabinet.
Ontario Premier Doug Ford says there is 'clear consensus' among premiers for separate bilateral trade deals with the U.S. and Mexico, following a phone call with all the leaders on Wednesday.
Canadian human rights advocate and former Liberal justice minister Irwin Cotler — who was the target of an alleged foiled assassination plot by agents of Iran — says he isn’t concerned about the alleged threats, because he has confidence in his protective detail.
A Dallas anesthesiologist was sentenced Wednesday to 190 years in prison for injecting a nerve-blocking agent and other drugs into bags of intravenous fluid at a surgical center where he worked, leading to the death of a coworker and causing cardiac emergencies for several patients.
A measles outbreak in New Brunswick that began last month with a single travel-related case is growing and today stands at 44 cases.
Raw pistachios sold by Nutworks are being recalled in Ontario due to possible Salmonella contamination.
Australia’s communications minister introduced a world-first law into Parliament on Thursday that would ban children younger than 16 from social media, saying online safety was one of parents’ toughest challenges.
President-elect Donald Trump has vowed to repeal President Joe Biden's signature artificial intelligence policy when he returns to the White House.
Giraffe populations are declining at such an alarming rate — from habitat loss, poaching, urbanization and climate change-fueled drought — that U.S. wildlife officials announced a proposal on Wednesday to help protect several of the species.
Lady Gaga is returning to the desert to mark her second appearance as the headliner for Southern California’s Coachella Valley Music and Arts Festival.
Liam Payne's family, friends and former bandmates have come together to pay tribute to the British singer at his funeral in England on Wednesday, just over a month after the One Direction star died aged 31 in Argentina.
Post Malone and Morgan Wallen's collaboration 'I Had Some Help' could make both men big winners at Wednesday’s night's Country Music Association Awards.
Black Friday and Cyber Monday are quickly approaching, meaning many people will be looking to score a deal ahead of the holidays. There are some precautions to take before shopping online.
The union representing port supervisors in British Columbia is formally challenging the legal and constitutional authority of the federal labour minister to order them back to work.
The heat has been turned up on two Canadian frozen-potato giants who have been named in separate price-fixing lawsuits south of the border.
After driving near the water that winter day, Brian Lavery thought he saw a dog splashing in the waves – then realized it was way too cold for that.
CTVNews.ca wants to hear from digital nomads who have taken up location-independent jobs and can work from anywhere with an internet connection.
Delta Air Lines’ newest dining option for first class passengers isn’t anything fancy. In fact, it’s the exact opposite, because it’s fast food.
Major League Baseball will test robot umpires as part of a challenge system during spring training at 13 ballparks hosting 19 teams, which could lead to regular-season use in 2026.
Since 2022, Dutch-born rider Rien Schuurhuis has become the first cyclist to compete for the tiny city-state of the Vatican at an elite level.
If the latest dance sweeping the sports world is any indication, Donald Trump and the NFL might get along much better in his second term in the White House than they did the first time around.
Even though sales of electric vehicles aren't growing as fast as in past years and President-elect Donald Trump may ditch tax credits for EV buyers, automakers are moving ahead with new models that should appeal to mainstream buyers.
A Saskatchewan woman who refused to provide a breath sample after being stopped by police in Regina did not break the law – as the officer's request was deemed not lawful given the circumstances.
In Canada a car is stolen every six minutes, though some vehicles are more sought after than others.
The Shopping Trends team is independent of the journalists at CTV News. We may earn a commission when you use our links to shop. Read about us.
