No they didn't "detain" her. They surrounded her with automatic weapons and threatened to blow her brains out if she moved.
def: detain -- 1.to keep in custody; confine. 2.to keep; withhold. 3. to keep from going on; delay.
Now, I don't know about you. pal, but, if they surround me with automatic weapons and threaten to blow my brains out if I move, I have brains enough to freeze as stiff as a marble statue. And, I will also consider myself thoroughly detained.
Just because one party is a dupe to self-delusion does not mean that the other party is a fraud.