If she was tied with something like rope then they could have cut the rope and left the knots intact for investigators. If she was “tied” with duct tape or similar they might have thought fingerprints was a possibility.
Not sure why they left her tied up, just thinking out loud...
Or she was tied with grape vine or kudzu and they did not have pruning snips on hand.
She is not deceased at this time. She’s tied to a tree...
May be the EMT called in as soon as they found her, sounds like she was not is good condition and I would guess they would check for any injuries made worse by immediately cutting her loose. It was probably only a couple of minutes until they had her loose.