Originally Posted by
bocastephen
4) a person must be able to stop the search and terminate the activity or relationship which triggered it - i.e., leave the airport checkpoint, federal building, courthouse, etc.
FliesWay2Much -- great thoughts and quite well articulated; thanks for taking the time to connect these ideas and bundle them into a package that seems to be scattered throughout the forum.
Bocastephen -- I suspect that many would interpret #4 above as the reasonable suspicion necessary to proceed from casual* to involuntary encounter*
*apologies to those in the know if I've misused the states of interaction