I’m with Oecolampadius (can we use a short version of your internet name, Oecol?). Tony is uneducated. He speaks like a young kid most of the time.
We all meet people who screw up words. We usually understand them, because we know what they meant. I doubt one will ever find “miffled” in any dictionary, slang or otherwise.
And, BTW, I think he should have been caught by the FBI. He was a cold-blooded killer.