Judith Vary Baker was the lady who claimed to have had an intimate affair with Oswald. She was a cancer scientist, employed by the CIA to create a virus essentially to give to Castro through a CIA plant in his medical staff.

She gave an account of the work she did, Oswald's (and Ruby's) involvement in the project and also those that touched the Garrison investigation including Clay Shaw and David Ferrie.

If she is lying, it's the most compelling and fantastic lie I've ever heard.