andrea canning: this woman was trish berlanga. l, she was joe's dance instructor before they started dating. trish had already called police when she learned about the murder, offering to help. what kind of questions are they asking you? trish berlanga: well, of course, where i was. did i want to see him dead? and, like, just really ridiculous questions, i thought. did they ask you if you killed joe? yes. yes. they asked me point blank. what did you say? no. absolutely not. andrea canning: and according to trish, what rochelle told police about her never happened. rochelle said that you frequently reached out to joe until he finally had to tell you it was over and essentially to stop. trish berlanga: huh. if two phone conversations in 10 months and two text messages is a lot, i guess. i don't see it that way. i was not begging him to-- to get back together. i knew he was with richelle. i don't go around and break people up. [laughs] even if it's someone i love. andrea canning: after speaking to trish, detectives knew they were look