In December the Supreme Court of Canada released their decision in R v Reeves. This decision considered what expectation of privacy an individual has in a shared digital device, such as a shared computer or tablet. The Court found that a third-party, even one who has access to the shared device, cannot unilaterally consent to a police search and seizure of the device.
When you cross the border into Canada from the USA, you are subjected to a search, where there is a lower expectation of privacy than you would otherwise have. A recent decision of the Ontario Superior Court considered the use of both detector dogs and ion scanners at the border. The case involved a truck driver crossing into Canada with a load of oranges, and upon inspection they found 30 kilograms of cocaine hidden among the oranges. Subsequently, the detector dog, Pumba, made an indication on a suitcase in the cab of the truck. A search of the bag revealed no drugs, although a swab of the suitcase put through an ion scanner tested positive for cocaine.