5.) I would guess this person may be described as a bit of introverted, bordering on a loner -- but, does indeed have friends, family, and acquaintances -- but are unable to form close relationships with anyone in their age group, or express what is truly eating away at them.
6.) I suspect this person has deep-seeded body image issues, and, likely rejects themselves from men/women their own age, due to a perceived flaw that is likely not even noticeable. I think they're unable to express themselves and feel overly helpless, unlovable, and, destined to be miserable.
7.) I think this person certainly has ties to the community, and, could've been a former alter boy, eagle scout, an all american midwestern kid. I would guess that women, however, have found themselves uncomfortable around this individual, but few could put their finger on why.
8.) I think this person went to the bridg with added layers to conceal suspicious instruments, and, so they didn't emerge from the woods with blood spatter. I would guess they probably washed up in the creek. It doesn't strike me an organized offender, though some elements seem meticulously planned. I would guess he had binding instruments, some kind of chemical, like bleach, for instance, and a weapon. I think he ideally wanted a single, slightly older victim. And, wanted to do a blitz style attack before they saw his face, but, was prepared to kill if this was required during the commission of the crime.