Song Ci also shared his opinion that having the accused suspect of the murder present at the autopsy of his victim, in close proximity to the grieving relatives of the deceased, was a very powerful psychological tool for the authorities to gain confessions. In the earliest known case of forensic entomology, a villager was hacked to death with a sickle, which led the local magistrate to assemble all the villagers in a town square to lay down their sickles in order for blow flies to gather around which sickle still had unseen remnants of the victim's blood; when it became apparent which sickle was used as the murder weapon, the confessing murderer was arrested on the spot.