Young boy allegedly runs mad after spending 10 nights sleeping in a graveyard to prove that he doesn't fear prison

This supposedly happened in Zambia. James Chileshe allegedly ran mad and stripped himself naked on day 4 of a bizarre challenge of sleeping in a graveyard. James was said to have challenged his area chief, Mukkuni, that he could spend 10 cold nights sleeping in the graveyard without interruption to prove that he doesn't fear prison.
The chief agreed and James went to lie flat on top of a grave. However, on the 4th day, he broke into prolonged  laughter, stripped himself totally naked, started dancing, singing and running helter skelter.
He has now reportedly gone missing and his family were said to have alerted the police. The said area Chief, Mukkuni, has not reacted to the incident.