richelle shetina. zach johnson: ok.ing: so the detective took a closer look at richelle's story. remember, the night before his body was found, she said joe was supposed to call her at home, but never did, and he never answered her texts. zach johnson: in my mind, this is the love of her life. she's very distraught, yet she calls him, and it's very uncharacteristic for him not to answer the phone. but we don't go to the house, we don't call anybody to go and check on him. to me, that was a little bit suspicious ow to me, that was a these people are involved. andrea canning: and when johnson spoke to the famy, he learned the rela marriage. was he open to marriage? again? missy bartlett: i don't think that he was looking for that. he was finding himself free to-- to explore the world, explore women. was richelle content with just, you know, being boyfriend and girlfriend. and just enjoying life? based on what joe told us repeatedly and how stressed out he was, no. she was putting the clamps on him to get married. andrea c

dixon, remember, dated richelle before she met joe sonnier. they were the doctors in that love triangle. narrator: reynolds then made a vague, but ominous connection between dr. sonnier and dixon. narrator: the detective, you'll recall, talked to dixon hours after joe sonnier was found murdered. narrator: johnson had been suspicious of him from the start. your spidey sense was going off. yes, yes. there were a lot of issues here that happened during this time with him. but i don't have any probable cause to go and investigate this man any further. narrator: for instance, that night, when the detective interviewed dixon, he didn't mention that shepard had dropped by to pick up those cigars. that information came from dixon's girlfriend. and he acted strange when asked about it. and he stood very still. and then he collected himself, and we're back to the, "oh, well, his name is dave shepard. why do you need to know about him? narrator: now that answer made sense. zach johnson: because he knows that david shepard is involved in the murder, and h