[Narvin grows tense at Kay pointing out that he noticed Narvin's interest in the investigation.]

Force of habit. I used to sometimes serve as a consultant for investigations of this nature when the Chancellery Guard needed a specialist in technical matters.

[Best lie he can do on short notice.]

Anything to get this matter settled quickly.

[At Kay's question, he glances at the dirt, then back up at Kay.]

I would spit it out again immediately.

But, if there were traces of unusual chemicals in the area, I would probably taste it.