strickland are quick to say is absolutely untrue. >> colin strickland releases a statement expressingan intention of pursuing a romantic relationship that would mislead anyone. moriah's family said at the time of her death that moriah made it clear to her at the time of her death that she wasn't in a romantic relationship with anyone. >> there was no active love triangle. >> moriah just happened to be the person that colin had dated briefly and kaitlin became obsessed with that. i think that kaitlin thought that there was a lot more going on and built it up in her head into something more. >> so, armed with new details about kaitlin armstrong and evidence that would appear to clear colin, authorities want to question her again. that's when they make a stunning discovery. she seems to have >> her phone was off. her instagram was gone. nobody knew where she was. >> essentially, kaitlin armstrong drops off the map. >> we have no idea where she is. >> and then a shocking new video of armstrong surfaces. >> she shows up at the austin airport, dressed casually. she's got a yoga mat. she's g