I'm also thinking along the lines of an accidentwhat's peoples thoughts on how the body was left? fully clothed, soon after the abduction, money still in the pocket, left on the ground (not buried)?
1. He was hit by a car.
2. GR went onto a property to look at something, the owners came out and caught him, a struggle ensued whereby GR fell and hit his head or was put in a headlock which caused his death. This would also explain the sighting of the two men struggling with a boy.
3. A pedophile tried to abduct him and accidentally killed him in the process.
IMO 'soon after' could mean anything from a few hours to a few days.