A judge in New York state exonorated two men who spent decades in prison for murdering prominent activist and civil rights advocate Malcolm X in 1965.

The ruling by state Supreme Court Justice Ellen Biben acknowledged the wrongful convictions of the men, Muhammad Aziz, 83, and Khalil Islam, who died in 2009. Both were released from prison on parole in the 1980s.

“The event that has brought us to court today should never have occurred,” Aziz, 83, told the court.

He and Islam, who maintained their innocence from the start in the 1965 killing at Harlem’s Audubon Ballroom, were paroled in the 1980s. Islam died in 2009.

Malcolm X gained national prominence as the voice of the Nation of Islam, exhorting Black people to claim their civil rights “by any means necessary.” His autobiography, written with Alex Haley, remains a classic work of modern American literature.

Near the end of Malcolm X’s life, he split with the Black Muslim organization and, after a trip to Mecca, started speaking about the potential for racial unity. It earned him the ire of some in the Nation of Islam, who saw him as a traitor.

He was shot to death while beginning a speech on Feb. 21, 1965. He was 39.

Aziz and Islam, then known as Norman 3X Butler and Thomas 15X Johnson, and a third man were convicted of murder in March 1966. They were sentenced to life in prison.

The third man, Mujahid Abdul Halim – also known as Talmadge Hayer and Thomas Hagan – admitted to shooting Malcolm X but said neither Aziz nor Islam were involved. The two offered alibis, and no physical evidence linked them to the crime.

Halim was paroled in 2010. Through a relative, he declined to comment Thursday. He identified some other men as accomplices.

The recent re-investigation found evidence that included orders from former FBI Director J. Edgar Hoover himself telling witnesses not to identify themselves as informants to the police or defense, Manhattan District Attorney Cyrus Vance Jr. told the court.

“I apologize for what were serious, unacceptable violations of law and the public trust,” he said.

Innocence Project co-founder Barry Scheck, one of the lawyers for Aziz and Islam’s family, said the review also found the FBI and police hid evidence from prosecutors, as what he called part of a plot to disrupt the Black civil rights movement.

The New York Police Department (NYPD) and the FBI said Wednesday that they had cooperated fully with the re-investigation. They declined to comment further.

NYPD Chief of Patrol Juanita Holmes said Thursday she felt for Malcolm X’s family and for Aziz and Islam “if we are responsible for withholding information.”

“I hope that we never revisit a scenario like this again,” she added.

Attorneys, scholars and others have long raised questions about the convictions, and alternate theories and accusations have swirled around the case. After Netflix aired the documentary series “Who Killed Malcom X?” early last year, Vance’s office said it was taking a fresh look at the case.

As news of the exonerations reverberated, even New York City’s mayor said the public deserved more answers.

“I hope this doesn’t end the discussion,” Mayor Bill de Blasio said. “For millions and millions of Americans, we still need to know who killed Malcolm X and who ordered it.”