While this year’s controversy has no direct relation to the Kennedy inquiry, it has raised new questions about how far the CIA has undermined congressional oversight, including the investigation into Kennedy’s murder in Dallas.

“It was time to fight one last time to ascertain what happened to JFK and to our investigation into his assassination,” Lopez, who is now the chief counsel for a school district in Rochester, N.Y., said in an interview. He is joined in the effort by two other former investigators, researcher Dan Hardway and G. Robert Blakey, the panel’s staff director.