[quote=@Fabricant451]
A question: I know we're playing thieves and all but would someone who is, say, a practitioner of confidence tricks fit the bill? Which is a roundabout way of asking if a con man counts as a thief in this manner. 
[/quote]

Sure, if you can put together a reason for them to have been working with the client/why they'd be selected for this sort of job~