We often think of serial killers and sexual predators as being drawn from the ranks of life's losers, men with histories of unending personal failure.
Col. Williams is about as far from that stereotypical profile as you can get, which will make this case of interest to criminal profilers for years to come.
I guess the first question I'd have is....what evidence is there that backs up the charges? Confession? DNA? Video? Eyewitness(es)?