These guys were really full of illusion - did they really think they would be allowed to leave the park and travel at will and then return as they like?
Regardless of their cause, this video does show to me the FBI ran them off the road and then executed Lavoy Fincum - if you go to about 1:40 and turn the off the stupid soundtrack. I'm sure the killer in the woods was in fear of his life.
https://www.youtube.com/watch?v=AYHdiprw4AA