yeah, but was that Jack or the other guy? i thought they discovered that the 'sunday school' crush kid was someone else? they just thought it was Jack for a while --
and, i understand that the murders, even at the beginning of the 'show', were related to Sam in some way, but if you remember the beginning, Bailey brings her 'back' to the VCTF - she had been there, then left -- and there were like 8 original kills before Sam came back - one of which was her husband --
and remember that Jack has an extensive education, mostly in medicine and anatomy, but he knows a great deal about computers too, and many other things, so he couldn't have spent all of his time chasing/stalking Sam, or he wouldn't be the 'professional' murderer that he is (not pro as in getting paid, but in knowing exactly what he's doing) --
and, with the expertise in 'murder' he has, he has probably been doing that for quite some time - you can't plan and go out and do it 'perfectly' the first time - he would have had to practice (murder, i suppose, is a craft like anything else, you have to practice to be good at it) -- so there's much more to Jack than we got from the show (and remember, i haven't seen all of season 3, nor most of season 4) -- we only have what Sam comes up w/ as her 'profile' on Jack -- but i don't recall her going into details about his childhood - (and i could have missed them)