Final answer:
Connell & Fernandez is the external auditor that started the audit revolution and returned over $240 million dollars to the Medicare Trust Fund.
Step-by-step explanation:
The external auditor that began the audit revolution and returned over $240 million dollars to the Medicare Trust Fund in the first six months of 2011 was Connell & Fernandez. They were contracted by the Centers for Medicare and Medicaid Services to audit Medicare billing and claims.