Originally Posted by Hudomonkey
If Ben had just told Lee when he went snooping they could have sorted it out and made sure that the stealing stopped without casualties
However I probably wouldn't have told Lee anything as the group doesn't have the best history with killing (Larry dead maybe others) and Ben probably would have been shot if he told them about it.
Katjaa didn't even know that it was Kenny who killed Larry (unless you privately tell her at the start of episode 3). With his own wife being kept in the dark about it, Ben and Carley/Doug presumably wouldn't know about it either.
Furthermore, the only reason anyone got shot by Lilly was because Ben decided to allow her paranoia to grow beyond control. Certainly not helped by the fact nobody believed her when she was correct. Not only didn't she know who did it, but she was left oblivious to the motive of the thief.
Without an explanation, and with the thief not wanting to make themselves known, you'd have no reason to believe the thief was acting as anything other than a form of "double agent" rather than a protector.
Bens arrangement was occuring before the events of the episode began, he didn't even need to wait as late as Lee snooping around before breaking the news.
When Lilly gave Carley/Doug a dose of 9mm to the head, nobody thought twice about whether it should be tolerated. Even in the face of knowing their must've been a thief among them afterall.
Ben is a parasite. A joke. An arguement winner against anyone who believes in "survival of the fittest".