MSNBC Dateline November 2, 2019 07:27:00
To parole out. >> somebody held the grudge, and got out and wanted him. >> reporter: even though investigators were convinced he was murdered because of his job as a prosecutor they doesn't stop there. >> we have to interview friends and family members and associates. >> reporter: mark was a tea tottler and he did not have a wife or kids. >> there was nothing there, he loved his mother who lived in dallas, he spent time taking care of her and taking her to dinner. >> reporter: all the initial checks in to his professional and personal life was not panning in. frustration was setting in. the ca...