Thinking of Shane because of an accident in my area.
One night, the end of october, a car collided with a truck on the motorway. According to witnesses, the driver of the car was wounded, possibly had broken a leg, yet he somehow stumbled away and disappeared. LE searched both sides of the motorway and found nothing. In later days, the search was extended with specialized SAR teams and divers and people in the area were asked to search their gardens and barns. It was thought that the wounded man, a local, was possibly hiding. Nothing was found.
Six weeks later, a body was discovered in the water, a few miles from the location of the accident. Turned out to be the missing man. No foul play is suspected, LE thinks he somehow ended up in the water and the body was carried slowly by the small river to the place where it was found.
There is no obvious reason why the man would have needed to go into the water, roads and bridges are nearby. The river isn't even next to the location of the accident. Places to hide are plenty. The car was in his name, LE could easily trace him. Running away did not make sense at all. Yet he ran off and ended up in the water. IMO shock and stress after the collision played a big role.