Who initiates a criminal investigation?

Answer 1

The government has certain specialized task forces that may be involved with that kind of investigation. Most likely the CIA or CSI would handle this investigation.

Answer 2

A criminal investigation is typically initiated by law enforcement agencies such as the police, FBI, or other relevant authorities in response to reports of criminal activities, complaints, or suspicious activities. In some cases, investigations may also be initiated based on intelligence or evidence gathered through surveillance or other means.