max farver: yeah. yeah. things only she would know. irst boxers name (the dog)? three, who was my best friend as a little kid?" keith morrison: and what was the response? max farver: nothing. i-- i never got a response to that one. keith morrison: which meant what? was that his not- in-her-right-mind mom, or could his grandma be right that someone had kidnapped cari? no way of knowing really, and the messages kept coming, like this one for caris mom. "im not hurt, mom. i miss everyone too. i just had a breakdown and i think im getting over it. i should have come to my senses sooner and realize the guy wasnt worth it." and then the following year for mothers day. "happy mothers day, mom. how has max been?" nancy frustrated, replied, "call me and ill gladly tell you about him. this is not talking. i need to hear your voice." cari never called. for nancy and max, the anguish of missing cari never stopped. and meanwhile, all dave kroupa wanted was to escape her. in february 2015 dave moved from omaha to council bluffs, iowa across the river

max farver: mm-hm. she-- she definitely did. so i-- i have her to thank for-- for what im going down now. keith morrison: i think shed be pretty proud of you. max farver: i hope so. i'm andrea canning, and this is "dateline." andrea canning: it was one of the most harrowing days in our history. the attempted assassination of president reagan. screaming, yelling. it's chaos. andrea canning: now an unprecedented look into the mind and new life of the gunman, john hinckley jr. with the stories you haven't heard, the police officer who questioned hinckley speaks out in his first nationally televised interview. i just didn't think that he realized the magnitude of what he had done. andrea canning: from behind the hospital walls. he turned to her and said, will you marry me? andrea canning: secrets from his diaries uncovered by "dateline." his obsession with actress jodie foster. the letters were assumed to have been love type letters. andrea canning: and the most controversial question of all. is hinckley really fit to be free? he's