If MS is not involved, it is strange (as others have pointed out), that he does not seem to have any concerns about becoming the next victim. He seems more concerned about continuing the practice (and keeping the office tidy, apparently). If I were the possible target of a meth ring, I wouldn't be hanging around doing custodial work in public.
Something I just find weird - he gave his own number to patients, instead of getting a new phone just for patients or simply using the office phone (can't it take messages either?). I'd think he would have known his phone would be overwhelmed by media calls, especially since the arrests. At least a separate number could have a message explaining that it is for patients only, and warn media he won't reply and they would be irresponsible to fill it up and keep patients from getting through.
IMO, he seems enraged, and I believe it is because he could not control TS, and most of his identity was wrapped up in being her husband and business partner. I think, somehow, that was threatened, and he couldn't accept it.