[The] common law test for the justification of police powers [to preserve the peace, prevent crime and protect life and property] has become known as the Waterfield doctrine [R. v. Waterfield (1963),  3 W.L.R. 946 (Eng. C.A.)].
R. v. Dhillon |
2012 CarswellBC 1715 at para. 27 |
Smith J.A. (Donald and Hinkson JJ.A. concurring)