Exactly. Once the patdown and ETD swab are done, if the TSO tries keeping you from boarding, the only question to ask is, "Am I free to go or am I being detained." If you do not get a reply, ask again. If still no reply, then state that you are leaving as you are not being detained. If the TSO says you are not free to go, then demand to know the crime he suspects you of having committed, since even if the TSO had detention power, he would need reasonable suspicion of a crime to continue to detain you. If the TSO cannot provide one, then demand a LEO to file a charge of unlawful detainment.