A lawsuit alleging that legal malpractice by Nexsen Pruet law firm caused the destruction of one of the South Carolina's most prominent locally owned hospitals, Tuomey Healthcare of Sumter, was filed Tuesday in state court in Sumter County. Relying on Nexsen Pruet’s advice caused the hospital in 2013 to lose a federal whistleblower lawsuit that resulted in a jury finding that the hospital had defrauded the federal government over false Medicare and other claims and owed $237.4 million in fines and damages, the lawsuit said.