A homicide is the killing of one human being by another, either lawfully or unlawfully.
An unlawful homicide is one committed without excuse or justification.
An excusable homicide is one committed by accident or misfortune, and without any culpable negligence or other criminal conduct.
A justifiable homicide is one committed in defense of self or others when necessary to prevent an unprovoked attack creating an imminent (ie: immediate) danger of death or great bodily injury.
An unlawful homicide is a very serious crime, divided into two types: murder, and manslaughter. The penalties for these crimes range from three years in prison to death.
Putting aside the legalities of remaining silent in the face of murder, the District Attorney's Office is firmly of the conviction that any person who has knowledge on the unlawful killing of another human being owes a moral duty, and an obligation to the society of mankind, to communicate that knowledge to a local law enforcement agency, or this office, so that justice may be served.