"One mugger once said '' I shot him because he didn't give me my money fast enough'. My money! That would be the Demented Creep type. However, I think the Bright, Personable Chap is more likely to write that ransom note and have all these 'creative' posings and false indications."

That's a good point. Why would the "Demented Creep" type even bother with the gentleman-like beginnings of the ransom note?