Duane Hart was a classic Fixated Preferential Pedophile. They are the "seducers". Most of the priest, scoutmaster type pedophiles are in this category. I can't find definitively that these pedophiles never snatch and abduct young boys off the street but I suspect that is mostly the realm of the Regressed pedophiles.
Jared apparently did not recognize Hart in the lineup and he seems to believe,although short of absolute certainty, that Hart was not his abductor. He is definitely open to the possibility that his abductor was also the guy who took Jacob.
A childhood friend of mine was abducted in a manner very similar to Jared. The perp was an Army deserter who had been living out of his car. He spoke with a "hillbilly" accent and had very bad acne scars. The was very consistent with other cases of abducting pedophiles. Low social class, limited social skills and under a lot of stress with little reasonable chance of finding an adult sexual partner. It is also consistent with a Regressive Pedophile.
From what I can tell, the regressive, abductor type pedophile very rarely kill or "disappear" their victims. There have been some situations of serial killers that targeted boys but most of the victims were sexually mature young men. There have been few that targeted Pre-adolescent boys.
It would be interesting to know more about the suspect the FBI developed for Jared. The only real "marker" for a regressive abductor type pedophile is a history of abducting and raping young boys. Suspects can be developed for different reasons including proximity to a crime scene, but without a confession or significant forensic evidence, I don't see how any case can be brought to trial or guilt can be inferred.
My own WAG (wild



guess) is essentially the same as the second comment on Joy's 1/7/14 blog with the added speculation that killing Jacob was not part of the plan and was something that "went wrong". Perhaps Jacob recognized the abductor or the abductor ended up using far more force than he had intended. I suspect this was the last snatch and abduction this perp ever did in Minnesota but he may have relocated and resumed his activities.