BC is described by others as quiet, reserved, not engaging in much conversation. Yet he was aggressive enough to have an affair and sex with HM (in his own home) hide it from his wife, engage in a sexual relationship with his bosses wife, don't care if he wasn't married, she was, stalked a former girlfriend, had an immediate friendship with a gal in France to the point he was looking for a Cisco job for her.
BC had no real man friends and the guys testifying all say this. NC was the glue in all the neighborhood relationships with the Coopers and BC was involved in things because of NC for the most part.
BC's calls to MH are part of his alibi he didn't want MH showing up at the house while in his cleaning frenzy.