Ascertain cause, Manner, and Time of Death
The Presumptive Sings of Death include cessation of respiration, cessation of heartbeat, changes in the eyes, and cooling of the body. Positive signs of death indicate that death has occurred. This includes postmortem lividity, postmortem rigidity, instantaneous rigor, postmortem decomposition, and insect invasion. All of these signs of death can help you determine time, cause, and manor of death.
Cessation of respiration is the apparent lack of breathing. In certain types of death like electrocution and drowning, the victim may not be breathing but life may still exist. To determine if breathing is occurring, watch movements of the chest and abdomen. You can also hold a mirror over the mouth or nose too see if the victim is breathing. If breathing is absent, other signs of death should be looked for.
Cessation of heartbeat is the absence of the heart beating. A person qualified using a stethoscope can only determine it. The doctor can't always detect a weak heartbeat so feel for the pulse or lay a hand f
If it were found in the snow the body would cool much faster then if it was found on a hot day. " This is not a good way to determine time of death because it is hared to tell if it was rigor or instantaneous rigor. "Rigor mortis normally starts in the head and neck and progresses down the body in an orderly fashion. This is when the muscles stiffen immediately at the moment of death. " This is a very good way to find the time of death. Postmortem lividity is livor mortis. The first sing of putrefaction is a greenish discoloration of the skin, "appearing in 24-72 hours of death. Postmortem decomposition, there are many ways for a body to decompose but the most common is a process called putrefaction. " This process will go much faster is the body is in very hot conditions. The cooling of the body can be different in the area were the body is. " This helps determine the time of death because at first when the body dies it is still limp it takes some time for rigor mortis to set in. The stiffening of the body is caused by chemical changes in the muscle tissue. If no heartbeat it is likely that death has occurred but it should be confirmed by another person. " If death has occurred the body will become the same temperature of its surroundings.