Actually, for my dicate. The answer is that the crime used a rope which connected with govery and tree long time ago before the rain. when the guy went to 秋千, the crime killed the holy guy with his arrow. and he used the rope send the holy guy to the grovery. Sincerely I think the crime was not the indian. that's because if it is the indian, he can kill that holy guy with the arrow directly. the crime was another jerk. He stole the indian's arrow and pretend the crime was the indian. it was a easy way to commit murder. It is not very hard, but I think the police can find the finger print on the both of rope or the holy guy's clothing or the arrow.秋千 was used as an hight to send the holy guy to another place. When it arrives, he can take the rope back easyly