Caught you
The group was still in the park and had no idea about what was going to happen to them. The park rangers slowed down and stopped the car, got out, and confronted them. After speaking, they told them that they had video proof of what they had done and they needed to come back with them.
The group tried to talk their way out of it, but when they saw the video recording of them, there was really nothing else they could say. They followed the park rangers back to their station and were punished. David didn’t feel better about it, but at least justice was served.