MSNBC Dateline September 21, 2019 07:49:00
21st issue, help wanted. make sure it's the last ad. >> reporter: and so they placed this classified ad and waited for a killer to call. coming up, a son's all too close call with death. >> had an argument that morning, so i didn't get to tag along with the ride that day. >> oh, no. you might otherwise have been there. >> i would have probably been the one to get off to go check that pump. >> and another member of the moore dynasty comes forward with a fresh piece of evidence. would an answering machine message finally solve the question about a motive for murder? when "dateline" continues.