Not every form of examination constitutes search. A search within the meaning of section eight is determined by whether the investigatory technique used by the state diminishes a person's reasonable expectation of privacy. The focus of analysis is upon the purpose of the examination. A police officer who compels someone to produce their licence would not be invasive enough to constitute a search (
R. v. Ladouceur, [1990]). Equally, an inspection of the inside of a car is not a search, but questions about the contents of a bag would be. (
R. v. Mellenthin [1992]) It has also been ruled that the use of a
police dog as a means to gain
probable cause to search is also in itself a violation of section 8, and that other factors must be present before a police dog can be used and a search executed. (
R. v. A.M. [2008],
R. v. Kang-Brown [2008]) In
R. v. Feeney, the Supreme Court found that the entry into a private home without a warrant constitutes a violation of Section 8. The use of wiretapping technology is also considered a "search" for the purpose of Section 8. Warrantless wiretapping can sometimes be justified under
section 1 of the Charter of Rights and Freedoms in cases where exigent circumstances exist; however the Supreme Court found in
R. v. Tse, 2012 SCC 16 that when police use such tactics, they must promptly notify the individual whose reasonable expectation of privacy has been infringed. The application of section 8 is not limited to the criminal context, and has become an issue in civil forfeiture litigation, with some courts holding that "exactly the same
Charter principles apply to the manner in which that evidence is obtained as would be applicable in a criminal case". In
R v Fearon (2014), the Supreme Court held in a 4–3 ruling that police search of a cell phone without a warrant during an arrest does not violate the
Charter. However, the Court ruled that police must follow several search guidelines. == Seizure ==