C-SPAN recently filmed panelists discussing the 1975 attempted assassination of President Gerald Ford by Lynette Fromme.
According to their website the run-time is 1 hour and 28 minutes.
It has not yet been aired.
The event took place on September 24 this year at the United States Courthouse in Sacramento, California, and was presented by the Eastern District of California Historical Society.
Panelists included the original prosecutors Dwayne Keyes and Donald Heller; original defense counsel John Virgo; Doug Duncan the Secret Service in charge of the Sacremento office in 1975; and Jess Bravin the author of Squeaky, the Life and Times of Lynette Alice Fromme.
The Event "An Oral History of United States v. Lynette Alice Fromme" is publicised here on the Court History.org website:
The page contains a link to the Sacramento Bee newspaper that has an article about it which has photographs of trial evidence exhibits (Fromme's holster and what looks like a page of a handwritten Fromme letter, her handbag and mugshot).