What is the test for determining whether a search or seizure under the Fourth Amendment can take longer or longer?

made its initiation permissible. [Citation.] Circumstances which develop during a detention may provide reasonable suspicion to prolong the detention. [Citation.] There is no set time limit for a permissible investigative stop; the question is whether the police diligently pursued a means of investigation reasonably designed to confirm or dispel their suspicions quickly." (People v. Russell (2000) 81 Cal.App.4th 96, 101-102.)

"In determining whether the challenged search or seizure was reasonable under the Fourth Amendment, we review the magistrate's factual determinations under the substantial evidence standard. [Citation.] We judge the legality of the search by 'measur[ing] the facts, as found by the trier, against the constitutional standard of reasonableness.' [Citations.] Thus, in determining whether the search or seizure was reasonable on the facts found by the magistrate, we exercise our independent judgment." (People v. McDonald (2006) 137 Cal.App.4th 521, 529.)