Covering Their Tracks

Was it the work of a single man or team? The FBI wasn’t aware of it. They used a mechanical tool that reel and release the rope which was found under the tree line. Obviously, the culprit was in a hurry to complete the task but he forgot that he was leaving tracks behind for the police that would soon lead them to him. They thought he was a professional but looking at his work the culprit was looking like a trained thief.