jared kushner, whose own voice was long a target of speculation. what does his voice sound like? my main business is real estate. reporter: jared found his voice. it s working and it s very exciting. reporter: but when robert mueller finally spoke, he spoke about not speaking again. now, i hope and expect this to be the only time that i will speak to you in this manner. reporter: am i the only one who thought robert mueller s voice would sound like ian mckellan! you shall not pass! reporter: did anybody else expect robert de niro s voice to come out of mueller s mouth? wait a second! reporter: after all, de niro played mueller. no collusion, no obstruction, so. don t stop me now reporter: not since monica lewinsky has everyone been talking so much about someone who wouldn t talk. her voice, just heard it. we haven t heard her voice. reporter: and even though mueller talked, he wouldn t