Are those his actual words? Don't you have to go to an Ivy League school to get to the top of the FBI hierarchy? If so, why does he not know how to use the word "prevail"? Or is this the fault of a redneck newfag with a tenth grade education?
He is using it in place of FORCE :
o (obscure) persuade (someone) to do something.
"she was prevailed upon to give an account of her work"
synonyms: persuade, induce, coax, convince, get, urge, pressure, coerce; More