NBC had a number of guidelines for what radio shows could and could not contain. This volume Broadcasting in the Public Interest, from 1939, outlines those rules. This first 'Standards and Practices' booklet soon became yet another standard throughout the industry. It was 6 by 9 inches and is 80 pages long.
Involuntary manslaughter usually refers to an unintentional killing that results from recklessness or criminal negligence, or from an unlawful act that is a misdemeanor or low-level felony (such as a DUI).
Murder, as defined in common law countries, is the unlawful killing of another human being with intent (or malice aforethought), and generally this state of mind distinguishes murder from other forms of unlawful homicide (such as manslaughter).