Thank you for posting thoughts about routes! I agree with Mollie being taken out of Brooklyn via 385 Ave. It's the only route that looks distinctly like a backroad out of Brooklyn. I think she was taken South on 185 Str as well. That route seems most likely, and I agree with you all the way to dumping digital evidence. I don't think he knew anything about WC. I agree with "avid hunter" or rural farm resident who knows the backroads.
Age is interesting, but I'm thinking someone closer to late 20s early 30s, but that's because I think this is related to the 2012 Evansdale murders. I think he practiced on younger victims before tackling an adult. I agree that this predator understands technology well enough to know that it needs to be managed during an abduction.
I don't think the perpetrator has any connection to Mollie beyond the possibility that he saw her perhaps the night before. I don't see this as drug related - too clean for a drugged up mind.
As for body location, I'm thinking miles from Brooklyn in what may be a seasonal hunting or fishing spot, definitely expecting her body to be found near a slow or shallow river.