I think it wouldn't take much for Moe to crumble, he had an obvious crush on ANS (remember it was he who went to the hospital with her, not HKS) and he and HKS had a huge argument and falling out over the camera at the gravesite and in the church; I don't think they are buddies these days.
Oh you bet they're not buddies anymore. We all kinda figured when Moe stopped doing interviews that he was cooperating with authorities. He has got to be the ultimate insider. Why can't they get HKS? Why? Moe knows everything.