["Cautious" would be acceptable. Possibly. "Distrusting", "vigilant", or maybe it's just instinct taking over.]

[Impatiently.] That's got nothing to do with it! When you're the one stuck listening to two civilians squabble over property, you start thinking differently about things like warrants. And it cuts down on time. Otherwise you'd have to explain the situation to every single person you come across or fight them.

[Asch sits up a little straighter, trying to feel out that inkling, but it has seriously diminished between the time he first noticed it and the time he opened his mouth. Just his imagination? No.]

[No... ...?]

[Asch rises to his feet, waving one hand dismissively.] A drink's the last thing I need. We're being watched.

[Or...they were. Did the culprit already escape?]