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Kendallia Killman, of Norman, Okla., poses with her family. Killman is among the plaintiffs in a federal lawsuit seeking class-action status against a private company the suit claims uses "extortionate" practices to collect court debts. She is the caretaker of her disabled adult son and lives on monthly disability payments of $543.

Credit: Courtesy of Kendallia Killman

Suit: Oklahoma sheriffs, judges let company extort people over court debts