i mean, and i -- my first thought was, "why didn't they listen to me?" they did not interview susan berman in a timely manner. what were they waiting for? godot? >> reporter: bob skipped susan berman's memorial service. and a few weeks later he surfaced in galveston, texas, another good place to get lost. except, of course, trouble eventually found him there. a killing, a dismemberment and an unforgettable acquittal. we all know the story, but not this version. coming up, did robert durst rehearse telling the truth? >> his wife and friend smuggled a little cassette tape recorder into the jail. he would then discuss with them whether or not he sounded believable with the story that he was telling. >> when "dateline" continues. ond alka-seltzer plus. concentrated power. nothing works faster for powerful cold relief. oh, what a relief it is! so fast!