Why do they conduct autopsies when someone is murdered •to understand the cause of death •to understand the circumstances of death •to understand the toxicology of the the body •to use as evidence in a trial

Explanation:

An autopsy is a routine procedure, usually conducted to determine a person's cause of death. Toxicology tests are usually ordered when someone is the victim of a crime, dies unexpectedly or dies for no obvious reason. The purpose of those is to determine if the deceased was under the influence.

to understand the cause of death

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blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.