A doctor in Muskogee is speaking out after a years-long fraud scheme was uncovered within his practice.Dr. Jack Weaver, a sports medicine and pain physician at Access Pain Solutions, said the situation has been both emotional and difficult to process.It made me sad that this happened, very frustrating that this happened, Weaver said. According to a plea agreement filed in federal court, Weavers former office manager, Katrina Dawn McCroskey, plea…