A Federal Police officer helps the Ministry of Labour's inspectors cross a barbed-wire fence during a grupo movel (mobile unit) operation where they raided a charcoal producing farm. Due to widespread unemployment and poverty, many workers risk their lives and freedom to take work in neighbouring states on farms that use unfree labour. This form of modern-day slavery is implicated most often via a fraudulent debt, used as an excuse to keep workers in the farm while they owe money to the farmer. They are forced to buy everything, from tools to food, from the farmer's shop, at inflated prices. The debt is never cleared and the workers are effectively trapped. The Federal Police and Ministry of Labour work to try and break this cycle of exploitation by raiding farms whenever they receive a tip-off that workers are being mistreated.