一个寒冷的清晨,警方接到报案,有人倒毙在郊外的一棵四人才能环抱的大树之下。死者前额有一个被撞击过的伤口,死因是失血过多。警方在死者身旁搜集证据,发现了以下四种凶器:一块坚硬的石头、一把金属柄匕首、一根粗麻绳、 A cold morning, the police received a report, some people dead in the countryside outside a tree can be surrounded by four. The victim had a shock on his forehead wound, the cause of death is excessive bleeding. Police gathered evidence of the dead and found the following four types of weapon: a hard stone, a metal handle dagger, a thick hemp rope,