Pulling off this coverup would require cooperation of many agencies and lots and lots of people. These kinds of things are really, really hard to do, because someone always talks.
> No fewer than four serious professionals within the investigation made specific allegations of evidence theft or tampering: Linda Kunz and Terrel Stacey of TWA, Jim Speer of TWA and ALPA, and Hank Hughes of the NTSB. Their allegations were taken seriously. Kunz and Speer were suspended from the investigation, Kunz permanently. Stacey was arrested. And Hughes was denounced by the FBI’s Kallstrom for his participation in a “kangaroo court of malcontents,” namely a U.S. Senate subcommittee hearing.
https://www.nydailynews.com/news/national/new-film-feeds-con...