The country's largest online source of JFK assassination records is suing President Joe Biden and the National Archives to force the federal government to release all remaining documents related to the most mysterious murder of a U.S. president nearly 60 years ago.

The Mary Ferrell Foundation filed the federal lawsuit Wednesday one year after Biden issued a memo postponing the release of a final trove of 16,000 records assembled under the President John F. Kennedy Assassination Records Collection Act of 1992, which Congress passed without opposition in response to Oliver Stone's Oscar-nominated film “JFK.”

The JFK records act, signed by President Bill Clinton, required that the documents be made public by Oct. 26, 2017, but President Donald Trump delayed the release and kicked the can to Biden, who critics say continued the policy of federal obfuscation that has existed since Kennedy was assassinated Nov. 22, 1963, in an open motorcade at Dealey Plaza in Dallas.

“It’s high time that the government got its act together and obeyed the spirit and the letter of the law,” said the vice president of the nonpartisan Mary Ferrell Foundation, Jefferson Morley, an expert on the assassination and the CIA.

“This is about our history and our right to know it,” said Morley, the author of the JFK Facts  blog.

Morley’s sentiment is shared by fellow historians, open government advocates and even some members of the Kennedy family, who usually don’t comment on the assassination.

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“It was a momentous crime, a crime against American democracy. And the American people have the right to know,” said Robert Kennedy Jr., the son and namesake of JFK’s brother. “The law requires the records be released. It’s bizarre. It’s been almost 60 years since my uncle’s death. What are they hiding?”

In another instance, the lawsuit asks the court to compel the public release of taped recordings of a man named Carlos Marcello, who allegedly told a cellmate that he was involved in JFK’s assassination. Transcripts of the recordings exist, but the foundation wants to hear the recordings to “fully evaluate the veracity and significance of these conversations.” Marcello died in 1993.