In the 1960s, William O’Nealserved as Fred’s bodyguard, and in accordance with the FBI’s instructions, he created some disagreements within and outside the Black Panther party and leaked a lot of information. On the evening of October 3, 1969, O'Neill prepared dinner for the members of the Black Panthers party after the party, taking the opportunity to add sleeping pills to Hampton’s drinks. At 4 in the morning, a team of police/FBI with live ammunition attacked his home, shot and killed Hampton, who was asleep in the bedroom, and opened fire on other members of the Black Panthers who were staying at his home.
The seven Black Panthers who survived that night were charged with attempted murder and armed violence. The police charged that the Panthers opened fire first and the police carried out self-defense. In 1970, the living Black Panthers and relatives of Hampton filed a civil lawsuit. In 1982, the Chicago city government and the nine plaintiffs reached a settlement of US$1.85 million. A subsequent investigation revealed that the police fired a total of 90-91 shots that night, and the Panthers fired a total of one. When a member was killed by the police, the gun fell off and hit the ceiling. In 1990, O'Neill, known as the "traitor," committed suicide. There have been divergent opinions about Harpton's death and what the police did that night
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