What type of investigation is initiated after any killing of a human being?

A homicide investigation is initiated after any killing of a human being because it specifically focuses on the unlawful taking of life. This type of investigation aims to gather evidence, identify suspects, and understand the circumstances surrounding the death. Homicide is defined as the intentional or unintentional killing of another person, and law enforcement agencies respond to such incidents with a specialized approach to ensure a thorough and systematic investigation. The process typically involves collecting physical evidence, interviewing witnesses, and assessing crime scenes to piece together what occurred.

Other types of investigations listed, such as robbery, fraud, and assault, entail different criminal activities that do not directly pertain to the act of taking a life. Each of these investigations has its own objectives and methodologies, but they do not focus on investigating homicides specifically.