In 1965, a car full of klansmen shot and killed Viola Liuzzo, a white woman from Detroit who volunteered to drive civil rights activists back to Selma after the march to Montgomery. The FBI immediately kicked into overdrive to drag her name through the mud.
Sources:
Stanton, Mary. From Selma to Sorrow: The Life and Death of Viola Liuzzo. Athens: University of Georgia Press, 1998
Mendelsohn, Jack. The martyrs : sixteen who gave their lives for racial justice. Harper & Row 1966
https://www.justice.gov/crt/case-document/micheal-schwerner-james-chaney-andrew-goodman
https://famous-trials.com/mississippi-burningtrial/1978-barnetteconfession
https://mississippiencyclopedia.org/entries/schwerner-michael/
http://repository.wustl.edu/concern/videos/7p88cm77s
https://voicesofdemocracy.umd.edu/dr-martin-luther-king-jr-long-not-long-speech-text/
https://archive.org/details/martyrssixteenwh00mend/page/176/mode/2up

Earl Turner's Diary
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CZM Rewind: Blood River & Mission South Africa
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CZM Rewind: The Whites' Last Stand & The Jamboree in Jamba
1:54:26