the court reiterated that there is a common law rule governing police powers of the detention must be viewed as reasonable necessary of the circumstances , informing the officer's suspicion that there is a clear Nexus between the individual to be detained and recent or on-going criminal offences . Reasonable grounds figure at the front-end of such as assessment underlying the officers reasonable suspicion that the particular individual is implicated in the criminal activity under investigation. The supreme court preferred the phrase "reasonable grounds to detain " rather than the phrase " Articulable cause " .
