I seem to recall that the last time a Wookiee was taken to a detention facility, there were multiple stormtrooper casualties, a princess was rescued, and someone lost a very expensive Death Star. If they were able to "capture" this Wookiee, they probably do not yet realize the full extent of their peril. In the words of a certain Admiral, "It's a trap!"
Deep within the dark recesses of Cell Block AA-23, a guard mutters, "I've got a bad feeling about this..."