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).
Second degree murder is such a killing without premeditation, as in the heat of passion or in a sudden quarrel or fight. Malice in second degree murder may be implied from a death due to the reckless lack of concern for the life of others (such as firing a gun into a crowd or bashing someone with any deadly weapon).