Madden engages in suspicious behavior such as suggesting to Norah several times that he himself could be the caller, secretly tape recording his discussions with Norah, listening to tapes of Norah and other women talking about obscene phone calls, and obsessively studying pornography and the behavior of sex perverts, despite the fact that he is exposing his ten-year-old daughter to such adult concepts and he is being reported to his superiors at work.However, midway through the film, it is revealed to the audience (but not to Norah) that the obscene caller is actually Lawrence Sherman (Sal Mineo), a waiter at the nightclub where Norah works.