Another article. This one nails down the last sighting of Sara at 6:30 AM the morning of February 4, 2015. The van was first seen in the field at 6:45 AM about 75 yards off the road.
http://www.fayobserver.com/news/crime_courts/fbi-offering-reward-for-missing-fairmont-woman/article_792ced29-ab72-534b-9c8e-1d31583d0cf5.htmlFebruary 4, 2015.
Last seen at 0630 and then a witness sees the van parked in that field at 0645. That's only 15 minutes. Something happened to Sara and the van driven to that spot, parked and locked and no evidence or sign of a struggle? If this was involuntary, whoever did this was very organized and planned this well. Or the last sighting of 0630 is off.