Reverend Willie Maxwell was a rural preacher accused of murdering five of his family members for insurance money in the 1970s. With the help of a savvy lawyer, he escaped justice for years until a relative shot him dead at the funeral of his last victim. Despite hundreds of witnesses, Maxwell’s murderer was acquitted—thanks to the same attorney who had previously defended the Reverend.

Sitting in the audience during the vigilante’s trial was Harper Lee.

Casey Cep brings this story to life, from the shocking murders to the courtroom drama to the racial politics of the Deep South.