The family of civil rights leader Malcolm X marked the anniversary of his 1965 assassination on Tuesday by announcing plans to sue the FBI, New York Police Department, and CIA for $100 million, claiming they concealed evidence related to his murder.

Two men who were convicted of murdering Malcolm X in 1966 were exonerated in 2021 after serving decades in prison—and the New York District Attorney admitted that the FBI and NYPD at the time withheld evidence.

The New York Police Department said it would not comment on pending litigation. The FBI and the CIA did not immediately respond to requests for comment.

Malcolm X rose to prominence as the national spokesman of the Nation of Islam, an African-American Muslim group that espoused Black separatism.