In the movie JFK, there's a scene in David Ferrie's apartment that shows cages full of mice and medical equipment.
This is based on a well established fact that Ferrie claimed to be involved in cancer research and in fact did have mice and medical equipment in his apartment.
Astonishingly, in addition to being involved in providing military training for Cuban exiles and hanging around with Lee Harvey Oswald, Ferrie appears to have been a contractor running an "off the books" lab for a secret government-sponsored program run by New Orleans physician Alton Ochsner.
An amazing claim, but very well documented in the book "Dr. Mary's Monkey" by Edward T. Haslam, the son of a prominent former Navy officer and physician on the faculty of Tulane University.
The 1964 murder of a nationally known cancer researcher sets the stage for this gripping exposé of medical professionals enmeshed in covert government operations over the course of three decades. Following a trail of police records, FBI files, cancer statistics, and medical journals, this revealing book presents evidence of a web of medical secret-keeping that began with the handling of evidence in the JFK assassination and continued apace, sweeping doctors into coverups of cancer outbreaks, contaminated polio vaccine, the arrival of the AIDS virus, and biological weapon research using infected monkeys.