Gary Thomas Rowe Jr., an FBI informer who infiltrated the Ku Klux Klan during the 1960s and helped convict three Klansmen accused of killing a civil rights volunteer, has died. He was 64.

Rowe died of a heart attack May 25 in Savannah, his hometown.A television crew shooting footage for a program about the FBI and the Ku Klux Klan learned of Rowe's death last week, The New York Times reported Sunday. Rowe's death was confirmed by Eugene Brooks, who had been his lawyer, the newspaper said.

Under the federal witness protection program, Rowe had settled in Savannah and assumed the name of Thomas Neal Moore, under which he was buried.

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