View the Youtube video.....
A few years after the coup, Benavides told a reporter that he clearly saw the killer and Benavides referred the the killer as .... "This other man".... He Did NOT identify this "other man" as Lee Oswald.
Benavides DID know that Lee Oswald was NOT the killer.....And he told the police that he could not identify Lee as the killer.... in fact h was sure that Lee was NOT the killer. ( he saw the killer face and he described the killer's hair cut which was NOT Lee Oswald's face or the fashion in which Lee had his hair cut) Thus they did not want any affidavit or any statement from Benavides.
You're talking about "A CBS News Inquiry: The Warren Report" (1967)
Benavides does say "This other man" when he corrected himself after originally saying "Oswald".
But, that is a far cry from your claim that Benavides told the authorities that he "could not identify Lee as the killer" and that he "was sure that Lee was NOT the killer".
In reality, Benavides did not attend a lineup because he felt he would not be able to identify the killer. To the best of my knowledge, Benavides never said anything to them about not being able to identify a Lee Oswald.