Chesapeake Energy is facing a possible class-action lawsuit, which claims it has cheated North Texas landowners of at least $100 million by pumping gas from properties that had gone through foreclosure, invalidating the oil and gas leases. Chesapeake continued to tap reserves beneath the various properties in Johnson and Tarrant counties even after the Oklahoma City-based energy giant discovered it had troubled leases following the economic downturn in 2008, choosing instead to "ignore the problem," the lawsuit asserts.