Her Majesty's prosecutor's office isn't actually sure if they have a case against either of Wain's accomplices, but they have enough suspicion to take them in for questioning. They do check, since it's a sensitive political case and the targets some of Cotonnet's delegates, if that's all right, and are told they may but should exercise good judgment and absolutely not use the city watch for it. Comez-Xarra wasn't planning to. He is hanging enough people this week and doesn't need to add two lucky city watch officers assigned to arrest a Calistrian whore and guaranteed to assume that you're allowed to rape the prisoners if they're Calistrian whores. If he ever tires of hanging people he can start ordering the arrest of random whores, and then the arrest of their arresting officers, until he's thinned out the Watch by half but probably this would not actually be a service to Her Majesty and certainly it wouldn't be a particularly enjoyable one.
He'll send two responsible adults capable of acting on their own interests, to pick the delegate up from her lodgings and escort her to questioning. She should arrive uninjured, please.