Caprio has figured out that Truly hired Oswald to put him in place as the fall guy.
You see, Truly knew that JFK was going to be assassinated in Dealy Plaza months before the visit to Dallas was even planned.
That's why Truly didn't check Saint Patsy's references.
It's amazing that Caprio can figure this all out, and not be able to figure out what year Benavides died.