The klansman in which you were referring to is the ringleader of the bombing of the church that killed the "Four little girls" as they are titled in Spike Lee's documentary on the event. J. Edgar Hoover, from what I heard on the news this morning, was the person who stopped the investigation and prosecution citing " Lack of evidence". The klansman own family members gave evidence to have him convicted and also apologized to the four girls' families. There was an informant who knew everything but was anonymous for nearly four decades that was forced out of hiding by the prosecution and now they have a strong enough case to convict because they have taped meetings of the informant and the alleged bomber.
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