When must a medical examiner be called to the scene of a deceased person?

A medical examiner must be called to the scene of a deceased person when it may be relevant to evidence such as suicides or homicides because their role is to determine the cause and manner of death, particularly in cases that are suspicious or unexplained. In situations of sudden or violent deaths, which could include suicides or homicides, the involvement of a medical examiner is crucial for gathering forensic evidence, performing autopsies, and ensuring that the investigation is thorough. This process helps law enforcement understand the circumstances surrounding the death and contributes to any subsequent legal proceedings.

The other options may involve considerations for law enforcement, but they do not encompass the full necessity for a medical examiner's presence. For instance, the status of the deceased as a known criminal or the location where the body is found does not inherently dictate the need for a medical examiner; rather, it is the nature of the death itself that is of primary concern. Similarly, witness statements can be valuable to the investigation, but they are not determinative factors for calling a medical examiner.