ex-girlfriend of the youngest suspect, larry nicassio. she believes nicassio was involved somehow, but did not kill katrina. and just like the first girlfriend, she's also agreed to cooperate. >> we couldn't break through to larry, so we asked brandy, would you like to talk to him? she said, absolutely. >> i told him. >> told him what? >> he was angry that she had shared what had happened. >> she tells nicassio she's talked to the cops. watch as she tries to get him to confess his involvement, and he, angry, resists. >> you don't know what they have on you, larry. >> they might have lied to you. >> i don't care anymore. i don't care! >> you care what happens to me? >> i do. and that's why i did that. because i do care about you. >> now she tries another tactic. she tells nicassio that she is not the main suspect in the murder of katrina montgomery,