
Quoting
cdwjava
...a detention "justified solely by the interest in issuing a warning ticket to the driver can become unlawful if it is prolonged beyond the time reasonably required to complete that mission."... And, a further decision that states that the key is whether or not "the police diligently pursued a means of investigation reasonably designed to confirm or dispel their suspicions quickly."... They have further decided that questioning the driver on matters unrelated to the reason for the traffic stop is allowed as long as the questioning does not unduly prolong the detention.... the officer's inquiries may not "measurably extend the duration of the stop.")...