>> what do you think told about michael reese? >> nothing at this point. the mars police officers, they knew him, from across the street, but not on a personal basis. >> michael's friends and family would fill in those gaps for the detective. and in the process, lay their secrets that would rock this small, religious community. could one of those secrets lead to michael's killer? coming up, michael, it seems, was loved by everyone. >> he was a huge part of so many peoples lives. and then he was just gone. >> he was just a console >> investigators wonder if his wife knew something different >> was this about figuring out if there was anyone that they had issues with, that kind of thing? >> absolutely. >> -- no, i really don't know. >> when dateline continues. ♪ birds flyin' high, you know how i feel. ♪ ♪ breeze driftin' on... ♪ [coughing] ♪ ...by, you know how i feel. ♪ if you're tired of staring down your copd,... ♪ it's a new dawn, ♪ ♪ it's a new day... ♪ ...stop settling. ♪ ...and i'm feelin' good. ♪ start a new day with trelegy. no once-daily copd medici