The Hamblen County Jail has been described as a dangerously overcrowded cesspool of a dungeon," with inmates sleeping on mats in the hallways, lawyers forced to meet their clients in a supply closet and the people inside subjected to "horrible conditions" every day. Since 2013, the number of people locked up in rural, conservative counties such as Hamblen has skyrocketed. Like a lot of Appalachia, Morristown, Tenn. ... has been devastated by methamphetamine and opioid use. Residents who commit crimes to support their addiction pack the 255-bed jail, which had 439 inmates at the end of October. While jail populations have dropped 18 percent in urban areas since 2013, they have climbed 27 percent in rural areas during that same period. Almost everyone in the county jail is there because of charges related to addiction, said the sheriff, Esco Jarnagin. Defense lawyers have proposed other options to address the crisis, including a pilot program [that] would have allowed some low-risk defendants to avoid having to post bail. But judges rejected the proposal because of fears that defendants would flee, said Willie Santana ... who is now one of four lawyers in the Hamblen County public defender's office. "The whole system is geared toward generating pleas and putting people in jail," he said. For many inmates, that means the jail has been a revolving door. More than three-quarters of the 850 new cases that Mr. Santana handled in the past year involved a client who had previously been incarcerated.