I'm from Georgia, and I've had people tell me to my face that they were shocked that anything intelligent came out of my mouth because of my acccc-cent (bless their hearts). For me though, my issues with what MR has said have nothing to do with regional accent, educational level or even uneasiness about speaking publicly.
When he speaks of matters not directly related to Dylan's disappearance, he is quite fluid. It's only when the sensitive details of that Sunday night and the following Monday are brought up that he begins to evade and confuse the issue. His inappropriate use of "we" indicates an effort to share or avoid responsibility. He doesn't say outright, "I didn't hurt (harm, kill, kidnap) Dylan". He says, "I would never harm that boy" or "I had nothing to do with it".
From the first, I feel that his statements have denigrated ER, CR, and more subtly, Dylan. I think he's being deceptive, but it's JMO and MOO.