That&#x27;s a good point, thanks. I ended up having a look through the differences between detention and arrest (finding different thresholds, e.g. &quot;reasonable suspicion&quot; vs &quot;probable cause&quot;[1], and that &quot;20 minutes or so is a reasonable timeframe for detaining someone&quot; [2]).<p>[1] <a href="http:&#x2F;&#x2F;www.nolo.com&#x2F;legal-encyclopedia&#x2F;arrest-vs-detention-how-tell-whether-you-ve-been-arrested-simply-detained.html" rel="nofollow">http:&#x2F;&#x2F;www.nolo.com&#x2F;legal-encyclopedia&#x2F;arrest-vs-detention-h...</a>
[2] <a href="http:&#x2F;&#x2F;criminal-law.freeadvice.com&#x2F;criminal-law&#x2F;arrests_and_searches&#x2F;arrest-detention.htm" rel="nofollow">http:&#x2F;&#x2F;criminal-law.freeadvice.com&#x2F;criminal-law&#x2F;arrests_and_...</a>