. >> when we met gerald mccullough at the river bend national security institution in nashville, tennesseeas halfway through a 12-year sentence on a sexual offense charge. >> there's no way out. there's just nothing to do. this is just a total waste of someone's life. >> despite his pessimism, mccullagh had found a productive outlet to express his pain. ♪ they say it's raining in denver ♪ ♪ that it's really kind of cold ♪ ♪ but i'm just pulling time in nashville ♪ ♪ how am i supposed to know >> shooting in a prison in nashville, the home of country music, we decided it would be great if we could find a country singer, and so we kind of made the call out to the other inmates and correctional officers, and they came up with mccullagh, and he turned out to be pretty good. ♪ talked about me how it never did seem right ♪ ♪ i've been pulling time in nashville ♪ ♪ wasting days and wasting nights ♪ >> writing music in prison is just my life. i don't sit down to write a song. something hits me, and my best songs come with about two minutes, in about two or three minutes i have an excellent song, an