By: Dylan Finlay
PDF Version: Deconstructing Investigative Detention
Case Commented On: R v Rowson, 2014 ABQB 79
Crime scenes are often intense and dynamic environments. This presents a challenge to investigators who – prior to making an arrest – must collect enough evidence to satisfy the standard of ‘reasonable and probable grounds.’ The recent case of R v Rowson, 2014 ABQB 79 displays this hurdle. The scene of the alleged crime – a motor vehicle collision – was attended by paramedics, firefighters, the police, and an air ambulance helicopter. Collecting enough evidence to make an arrest was not the police’s immediate priority. To mitigate the challenge that inevitably arises in situations such as this, police are armed with the common-law power of investigative detention. This post will deconstruct this power.
The common law power of investigative detention was developed incrementally and recognized by the Supreme Court of Canada in R v Mann, 2004 SCC 52. This case involved two police officers who, while responding to a break and enter, encountered an individual who matched the description of the offender. The individual, Mr. Mann, was stopped and made subject to a pat-down search during which one of the officers felt a soft object in his pocket. Upon reaching inside the pocket, the officer found 27.55 grams of marijuana and a number of small plastic baggies. Mann was subsequently arrested; prior to this he had only been under a state of detention. At trial, Connor Prov. Ct. J. held that while the police were justified in searching Mann for security reasons, reaching into the appellant’s front pocket after feeling a soft item therein was not justified in the circumstances. The conduct thus contravened s. 8 of the Charter, the right to be secure against unreasonable search or seizure. On appeal, the Manitoba Court of Appeal held that it was not unreasonable for the police to continue the search inside of the pocket. This was further appealed to the Supreme Court of Canada.