in fact, even as gary mcfarland cradled his father's lifeless body in his arms as his mother mary annushed to his side, they knew both of them without a shadow of a doubt who did it. >> she immediately started saying, "oh, my god, i'm sorry, i can't believe he did it. i'm so sorry. i'm so sorry." >> mary ann met with the cops and told them. >> janos did it. >> janos? who was janos? detectives pressed mary ann for more. >> she told us that her boyfriend was responsible for this. >> that's right, boyfriend. she had been having an affair? >> yes. off and on. >> he was janos kulcsar, originally from hungary. and once the police got the gist of mary ann's tearful confession -- >> she had a picture of him. said here's his address. >> they high-tailed it over to janos's apartment in nearby long beach. where they found his car. this was an hour after the murder. sitting all innocent-like not far from his door. so the officers, having had some experience with this sort of thing, performed a little test to see just how innocent that car was. >> and the engine hood was hot to the touch, so it ap