Tony worked on instinct, his main modus operandi. That and assumption of guilt. He knew that everyone in his team were just as likely to try to get him as any rival ‘institution’. It wasn’t paranoia, it was fact.
He felt he would know from responses to his text who was hiding something and who was trying too hard. What he didn’t consider, however, was, on the assumption that Terry was still alive, what role he might have played in the attack. This may have been his one Achilles heel.
But Terry was the one and only person Tony trusted.