The car was not with the individual

And is presently either sitting somewhere unnoticed and unattended, or someone knows something about the vehicle, like where it is parked, and hasn't been forthcoming.  If an individual is found in the Big Thompson River and foul play isn't suspected, what, was she wearing a bathing suit and told friends she was going for a swim but couldn't swim?  She worked at Ziggis coffee, there is a Ziggi's coffee in Estes Park, are we asking those employees for alibis?  Just because concrete blocks aren't part of the outfit doesn't mean foul play shouldn't be suspected, unless the police know a lot more about Ms. Fowler's mental state than they are saying.  Indeed, the fact that they are looking for a vehicle indicates to me foul play is very much suspected.

This is an individual who finished near the top of her class at Silver Creek High School in Longmont.  Either her Facebook page and tweets have been scrubbed, or her friends are the only providers of  Facebook content related to her life.  Her $400,000 Longmont home (likely her parents') seems to suggest a life not lacking in comfort, despite pulling up some old tax liens on the property, so this is indeed a puzzle, but I'm sure our crack squad of Larimer and Boulder County popos will get to the bottom of this like they did the JonBenet Ramsey case.  Meanwhile, citizen detectives, I would be looking high and low for a 2014 charcoal grey Toyota Rav4, Colorado license plates ABAQ33.  No one goes into the Big Thompson River on a cold day without some motivation, and this motivation could have been provided by someone who meant her great harm and much foul play.