Today I began to wonder when Tarkin, Darth Vader, and Agent Kallus started planning to get rid of Minister Tua.
Did Tarkin have the Inquisitor behead the two failed officers in front of her to put a scare into her, so that she could later be frightened into contacting the rebels for help by ordering her to report to Tarkin about her failure to catch the Lothal rebels?
Or did Darth Vader and Agent Kallus later come up with that plan on their own as a way to attract the rebels and replace a "soft" official? Was the beheading in front of her just something which made them think she might be frightened enough to defect to the rebels?
Either way is not very good for recruiting to the Imperial service.