It is the art of wrapping an accusation within a question.
"When did you finish beating your wife?"
"Why hasn't anyone investigated whether Padre Cruz helped Oswald kill JFK when we have pictures of the two of them together the day it happened?"
Counselor, if you were attempting to show he was linking Cruz dad to the assassination could you make it stick?
I can't.
I freely admit I have a belief in the goodness of man, and, in most cases, my reasonable doubt threshold may be set higher than most.