Just throwing this out there. I don’t know if the video recording of LS going with JS to his car is public, but maybe he told her a family member had been injured or was ill and had to go to the hospital and he was sent to take her to them.
Many of the Amish here have some goods for sale at their homes, fresh cut flowers, produce, crafts. I don’t know if her family did or didn’t but if they did he may have recognized her and knew where she lived so knew she would be going down that road. MOO and all that. Just some thoughts that have come to my mind.