Malcolm X, leader of the Nation of Islam, spoke to an audience on June 29, 1963, about his idea of complete separation of whites and African Americans.
The Manhattan District Attorney will be asking a judge to exonerate two men who were wrongly convicted in the murder of Malcolm X, his spokesman said.
The New York Times reported Wednesday that the FBI and the New York Police Department may have mishandled evidence that could have helped the men at their 1966 trial.
According to The Times, prosecutors failed to tell defense lawyers that there were undercover police officers in the Audubon Ballroom in Washington Heights in Manhattan when Malcolm X was shot.
After the release of the documentary series "Who Killed Malcolm X?", which highlighted longstanding questions about the fairness of the convictions, Vance said he would review the convictions.
After serving two decades behind bars for the murder of Malcolm X, both Islam and Aziz were released from prison in the 1980's.
Islam died in 2009, he was a driver for Malcolm X. The 83-year-old is alive.
The exoneration request will be heard in Manhattan Supreme Court on Thursday.
Mujahid Abdul Halim, one of the three men convicted in the murder, admitted to being one of the attackers, but denied that Islam or Aziz were involved.
Halim's conviction will not be affected by the exoneration of the other two men.
The Nation of Islam was a group that Malcolm X belonged to for years before he left it to follow traditional Sunni Islam.
The Nation of Islam leadership branded Malcolm X a traitor after he left the group. Malcolm X's house in Queens was firebombed a week before he was killed.
According to The Times, the evidence that was not given to defense lawyers at the trial included an FBI report that showed New York authorities were not told that another man, William Bradley, was a suspect in the assassination.
Bradley matched the description of the shooter given by the witness.
An FBI spokesman told NBC News that the agency cooperated with the investigation.
