"A rest is a good idea. The more I think about it, the more problems I foresee..
We don't want to split the party too much, once the spy departs then we'll want to get the others before pursuing, which will give him a lead. Also, he knows our descriptions, and may spot us watching for people leaving town. Now there are few people we trust, but I'm inclined to think that street children may be too young to have been indoctrinated into the cult. What if we paid several groups of kids to play by the town exits and come & get us at a central location when someone leaves?
Alternately, we could just conduct some more enquiries to try and identify a suspect, then obtain a sample of his handwriting through deception or burglary?"