Debt collection horror stories are nothing new. But there’s a whole other side to the industry that no one’s talking about: collectors hired by government agencies to hunt down debtors.

CNNMoney spent months investigating this booming business and one of its biggest players, Linebarger Goggan Blair & Sampson. Hundreds of consumer complaints were analyzed from state attorneys general and the Federal Trade Commission, among other organizations, and dozens of attorneys and other experts were interviewed.