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. he did for a while, attending texas tech off and on for a few years, but never graduating. mostly he spent time in his room, alone, writing gloomy poems and playing his guitar. ♪ >> dreamed of being a songwriter, musician. so for a summer he spent some amount of time out in l.a. pretending he was going to sell his music to companies and all that stuff.