>> leads were going out all over the country. we literally took his life apart to track him off every receipt he ever had, any dollar that was spent that we could track. we wanted to know where he'd been and what he had done as far back as we could go. >> what they found was a long trail of despair, deceit, and delusion. hinckley had a seemingly normal childhood. growing up in an affluent suburb of dallas, texas. he played sports as a boy and did well in school. but as he grew older, hinckley began to withdraw. his parents chalked it up to shyness. >> from the time hinckley graduated from this high school, highland park, in 1973, until his arrest, there was also a personality change. he had become quieter, more introverted, somewhat of a recluse. >> in 1973, hinckley moved to evergreen, colorado, with his parents. they hoped he would go to college.