Last week, the nation's largest prison and jail telecom corporation, Securus, effectively defaulted on more than a billion dollars of debt. After decades of preying on incarcerated people and their loved ones with exploitative call rates and other predatory practices that have driven millions of families into debt, Securus is being crushed under the weight of its own. Securus is one of two corporations that dominate roughly 80 percent of the U.S. prison telecom industry. Both companies are owned by private-equity firms: Securus, by Platinum Equity, and ViaPath (previously Global Tel Link), by American Securities. Together, Securus and ViaPath contract with 43 state prison systems and over 800 county jails. Their dominance of the market allows them to routinely charge incarcerated people and their families egregious rates for rudimentary communications services: A 15-minute phone call can run as high as $8.25; a 25-minute video call up to $15; and basic emails as much as $0.50, or more with attachments. The nature of agreements between these telecom providers and correctional agencies often further incentivizes the financial exploitation of the incarcerated, creating profit-sharing kickback schemes that provide prisons and jails with a portion of sales revenue. The ... tactics that brought Securus down"narrative change, policy campaigns, regulatory efforts, and investor activism"offer a roadmap for tackling exploitative corporate profiteers across the prison industry.