His only weakness

Beau.

''We will be leaving the community for a couple of hours,'' I tell Bells who nods in understanding. The reason why I am telling her is because I want her to hold down the fort while I am not around. Bell's and Rex are the only ones I trust and now that I know there is a mole, I can't think about anything else. It has been bothering me all day.

Someone here is feeding Cassius information about us and the things we are doing. It could be anyone in here.