The family of Malcolm X, the iconic Black civil rights leader assassinated in 1965, has filed a $100 million lawsuit against the U.S. government, alleging a conspiracy involving the FBI and NYPD in his killing, they announced Friday.

At a press conference in New York City, Malcolm X’s daughter, Ilyasah Shabazz, stood alongside her attorneys to unveil what they claim is new evidence supporting their allegations. The lawsuit accuses the agencies of orchestrating a decades-long cover-up that denied Malcolm X and his family justice.

“We fought primarily for our mother, who was here,” Shabazz said, referring to Betty Shabazz, Malcolm X’s widow who died in 1997. Speaking from the former Audubon Ballroom where her father was killed, she added, “My mother was pregnant when she came here to see her husband speak… someone she admired totally, only to witness this horrific assassination.”

Malcolm X was shot 21 times on February 21, 1965, in front of his wife and daughters, at the age of 39.

Civil rights attorney Ben Crump, representing the family, stated the lawsuit seeks accountability for the “unlawful and unconstitutional actions” of those involved. “This is about holding these agencies and individuals responsible for the harm they caused,” Crump said.