Non Sequitur

Starfleet security put a gadget on Kim and tell him that tampering means his immediate arrest. Naturally he tampers with it, triggering the alarm. Fortunately the designer of this gadget made it emit a beeping sound when the alarm is tripped, so that the wearer can tell security is on the way in plenty of time to escape. Worse, since the gadget must transmit Harry's position to security, why do they beam security to his position rather than simply beaming him into a cell?