Only a few minutes from now, the rodeo will end and the crowd will leave. Marlon Brown and his fellow participants will not. They are here, on these grounds, most likely until they die. They are inmates at the Louisiana State Penitentiary, a notorious plot of 18,000 acres so massive that it has its own zip code. These aren't petty offenders, guilty of failing to pay traffic tickets or taxes. The average sentence here is 93 years.