corey atchison (on phone): hey bro. what's up bro? corey atchison (on phone): what's up with ya?, like when we were talking about you coming home, i'm like, i was just on the other side. you know what i'm saying? corey atchison (on phone): when you locked up, it's like you're buried in a casket under the ground. recording (on phone): this call will be terminated in two minutes. corey atchison (on phone): you've got to climb up out of there and-- or don't give up. you know? that's what it is. corey atchison (on phone): yeah. one little piece at a time man. every little step we take it is going to get us to that final, to that big goal. you know what i mean? to that big one that we reaching for. narrator: will corey and malcolm finally reunite? coming up. you know there are also other witnesses who-- who recanted. i don't know that. ok. i don't know who said what. narrator: the da in corey's case faces some questions. but you could see how someone would say, you've got several witnesses, all saying their testimony was coerced. can they all be lying? narrator: when dateline continue