the geriatric unit at the joseph harp correctional center in lexington, oklahoma, holds more than 250 elderly and disabled offenders. it was created 3 years ago in response to a massive explosion in oklahoma's elderly prison population. >> our fastest growing segment is the inmates that are the age of 50 and over. we have about 3,700 now - that's grown almost 200 percent in the last decade - and projections are we're gonna continue to grow about 45 percent a year - because of enhancements to punishments, 'tough on crime', 85% laws that require you to serve 85% before you're even eligible for parole, and then the advent of life without parole. >> my name is plutarcho hill and my number is 48713. i received that january the 16th, 1948. >> plutarcho has the oldest inmate number in the state, he is 86 years old - 66 of those years have been spent behind bars. he's escaped from prison 10 times. >> so you're as good getting out of prison as you are getting in? >> well, when my health was good. >>what are you serving for now? this sentence? >> it was a murder charge. >> how long ago? >> 1947