[gunshots] john hinckley jr. today after being institutionalized for more than three decades, he is pretty much a free man. it was a rainy spring monday in washington, dc, just a few months after ronald reagan was elected president. del wilber: march 30, 1981 is 70 days into reagan's first term and it's a nothing day. he's given a speech at the washington hilton. troy roberts: a nothing day that was about to turn into a day no one would ever forget. los angeles times reporter del wilber interviewed well over 100 people for his book "rawhide down." rawhide, the secret service codename for president reagan. we're going to convince this city that the power begins and ends with the people. [applause] del wilber: he gives a speech. he's walking out. it's 2:27 pm. judy woodruff: i was part of the press pool, which is the small group of reporters who follow along in the motorcade. troy roberts: pbs newshour anchor and managing editor judy woodruff was the white house correspondent for nbc news. he came out the door and

federal judge concluded that hinckley's mental illness was in full remission and granted his unconditional release. it was a new chapter in the life of john w. hinckley jr. who four decades after shooting an american president appeared at peace with his past. that's all for this edition of "dateline." i'm andrea canning. thank you for watching. i'm andrea canning, and this is "dateline." someone at a park at 3:00 am. i think she knew the second she got in his car that something was wrong. andrea canning (voiceover): a college student disappears. andrea canning (voiceover): a secret life uncovered. she was on a dating site looking for sugar daddies. going into it blindly is not something i would recommend. andrea canning (voiceover): chilling details revealed. is this guy dodging us? he kind of selected her as his victim. correct. towards the bottom of the dig site, there was a damaged iphone. it looked like maybe clothing. it was just a sinking feeling, really. i just replay this one night i had with her, and i just want to grab her and say, don't do it. don't go. hello, and welcome to "dateline." college student mackenzie lueck was diving into adulthoo