The police installed an unauthorized electronic tracking device (a 'beeper') in the appellant's vehicle after a search warrant had expired.
They used the device to monitor his movements, which eventually led to evidence connecting him to the destruction of a communications tower.
The Supreme Court of Canada held that the installation and monitoring constituted an unreasonable search in violation of s. 8 of the Charter.
However, the majority concluded that the evidence should not be excluded under s. 24(2) because it was real evidence, the police acted in good faith out of urgency to protect the public from a suspected serial killer, and the admission of the evidence would not bring the administration of justice into disrepute.
