>> but was money the only motive or was there something else? >> couldn't believe somebody could do that to her. just pure evil. >> hel oo and good morning to "dateline." police were baffled. this was no accident. but were the clues to who killed agszly now up in smoke? it wad with would take a determined detective and the discover of a stolen key to unlock this mystery. here's black friday. >> a hot august night in texas, 2014, the figure knew where to go, grabbed $18,000 and was gone. but it was only money.