Last Root Of Ngnun
It would be too easy to gain trust and then betray, so onago never fully trusted the reports he got. be they markers or their meetings every other night.
Hustling Through the Dark - the full novel
Given affinity group who wants to promote their viewpoint over another one... which, come to think of it, is probably just about every affinity group... but also a good number designed to fake being part of a competing group, sometimes for years, to gain trust