Another thing to think about in our efforts to profile a suspect, IMO, is his occupation. If he was employed, his job was one where he did not work all day in an office. It took longer than a lunch hour to abduct the girls and take them to Seven Bridges, kill them and leave their bodies (my theory) or to wherever he held them.
I thought of a delivery driver, but they are usually on a schedule and a large, unexplained block of time would be suspicious, IMO. I think the perp was unemployed, self-employed, or had the sort of job where he could set his own schedule.
If the perp did have a "traditional" job, he must have left around noon and not returned. JMO.
I don't know how it works in Evansdale, but a lot of people here take Friday's off - they bank time through the week. That it happened on a Friday at noon ... does that necessarily mean that it could not be someone that works in an office?