Agnasci is left in a state of confusion, denial, and regret. He is used to people being disappointed in him; that's not the issue. It's the injustice of it all. He goes over the past few days in his mind, searching for something he should have done differently. He's absolutely convinced the Dogs of War should not have been ignored, and even Penrose's admonition now wasn't enough to convince him he made the wrong move trying to infiltrate the gang.
But he shouldn't have left them at the house. His greed had overcome him. That's why he convinced Law to put handcuffs on Rich. That's why he stole Rich's bike, and left everyone behind. The others don't know this, of course, but it's enough that Agnasci himself knows.
"I'm sorry, everyone," Agnasci says. He even means it, but not for the reasons they think. He turns to Faye and looks her in the eye. "Penrose is right, of course. I owe all of you my life. But you in particular...you were the biggest part of that. You always know the right thing to do, and you do it without hesitation. Thank you." He knows the words will probably mean more to Faye than it cost him to say. Hopefully it's a start toward repairing the damage he's done to his relationships...
He's suddenly very uncomfortable around the others. He wants to leave, but he knows he can't yet. It would look like he's storming out. He glances around nervously at the others, hoping the interrogation is over.