How do you tell a nut, "Hey, those are my squirrels!"

Bit of a pickle here. I've been training a small troop of covert squirrels, mostly for infiltration and interogation purposes. Strictly on the QT, the director "will disavow any knowledge of (me) and (my) activities" if caught or brought to light. So, I'm giving my hard-working, patriotic rodents a little R & R time at the park (they're chatting up the local females and intimidating the local males) when this clearly crazy guy comes up talking about how NSC has implanted a chip in his head and he needs a squirrel to chew it out of his forehead. I tell the boys (who later intimated that it would have been a good opportunity to "liquidate" an "intelligence liability" to rendez-vous at HQ, mumble incoherently at the nutcase, and amble off. Turns out he interpreted the mumbling as a message from the Templars to the effect that I was the 'Usher' and 'Ward Captain' and he surreptitously follows (who knew he could stay silent so long?) me to HQ. Today, he's forgotten the Templar message but he really wants at the squirrels (who really want to "take him out with extreme prejudice" or some stupid phrase they've picked up from the movies) and I'm not sure what to do. Any ideas?