Their exploits are portrayed in countless movies and TV shows, but author Doug Swanson says the law enforcement agency has a dark history of abuse and officially-sanctioned racial oppression — including burning villages, hunting runaway slaves and murdering Mexicans and Mexican-Americans. Swanson's book is 'Cult of Glory.' Jazz critic Kevin Whitehead looks at what he calls the "stock jazz-movie ending," a basic plot element subject to many variations.