college student mackenzie lueck was diving into adulthood, eager to find her path. her family and friends knew her as fun, responsible, and always careful. then, one night, mackenzie vanished. a trail of electronic clues helped investigators retrace her steps and exposed a dark underworld where evil was hiding behind webs of lies. here's keith morrison with "the waiting car." keith morrison (voiceover): our minds have a curious way of deceiving us. we sense something off, something wrong, even terrible, and yet something in the brain wants to believe the worst didn't happen. kennedy stoner knows that feeling well. i was kind of pushing away from my gut instinct. i'm not really sure why. i never imagined this ever happening to one of my friends. i wouldn't think you'd want to imagine it, right? no, or anyone that i know or-- so my mind didn't go there. keith morrison (voiceover): so she told herself it would be fine, as she reached out from her home here in salt lake city, utah, messages to her friend, mackenzie lueck. kennedy stoner: i saw that she wasn't opening my

mackenzie lueck was an innocent, setting out, if only for a moment, to explore new possibilities, unaware that in the world she was entering, the innocent can also be prey. that's all for this edition of "dateline." i'm andrea canning. thank you for watching. >> good morning, and welcome. >> to this sunday edition of morning joe. >> weekend. >> it was yet another fast moving news week. here are some of the most important conversations that you might have missed. >> president trump. continues to defend. his pardons for all of the january 6th rioters. the president downplayed the violence against police officers that day in the first oval office interview of his. new term. take a listen. >> for a number of reasons. number one, they were in there for three and a half years, a long time, and in many solitary confinement, treated like nobody's ever been treated. it's treated so badly. they were treated like the worst criminals in history. and you know what they were there for? they were protesting the vote because they knew the election was rigged and they were protesting the vote, and that yo