Being able to see if the person has any active scents might also be usefull, perhapse as a second skill. It would be a relativly expensive Skill, higher then Ranging even. The target would have to agree to the scan, like being kinned and the result is a simple "Trespassor/Theif/Assailant/Vandal/Batterer/Murderer" message.
Linking this ability with Charima in some way could also be interesting. Perhapse Charisma * Stealth of the target is used to block the scan and Perception * Charisma of the scaner is the offensive value, if the targets value is higher they appear non-criminal. Of course once the scents expire a person will always get a clean bill, their would be no false positives. Charisma is used because its like a Bluff check.
Lawspeakers and high level rangers could go about Interogating people at Random, no one would expect them
