seemed the lovelaces were in true form. christine adopted curtis' sons as her own. everything was working. but darker souls wait for the train wreck just when things are looking all humpingy doshry. it turns out that train was hurdleing down the track. >> coming up a new detective leads to new suspicion. >> what jumped out at you? >> most definitely that her arms where in an unnaturally raised position. >> and the start of a new information. >> in the autopsy there were things listed as suspicious findin findings. >> my first thought is we missed something here. >> when "dateline" continues. l . ( ♪ ) stop dancing around the pain that's keeping you awake.