flinn and randall went inside. lattime and another boy waited in the get away car. >> they broke into the place. then they set it up to make it look like a burglary. i guess the guy tried to run or something. they grabbed him. they threw his dog in the cellar. they held the guys head and shot him. >> reporter: but what was the alleged motive? >> this is just what they said from pam. >> you're talking about pam, who's pam? >> the guy talk talke talke >> pam smart. >> reporter: they discovered that all three have a connection to pam smart. they attend the school where she's working as a media coordinator. >> i met bill who's kind of making me feel like i'm the greatest thing on the earth. >> reporter: he was charming. >> he was. and i needed a boost. >> reporter: police are led to another student named cecelia pierce. pam's intern at the high school. their interview appears in an interview on "discovery i.d." she tells police that billy and pam were lovers. >> they were friends. then they were having an affair. >> ho