U.S. Attorney Zachary A. Keller Highlights a Dozen Significant Prosecutions During Government Shutdown

Michael L. Riggins, 62, of West Monroe, was sentenced to 57 months in prison and ordered to pay roughly $1.8 million in restitution on October 27, 2025. Riggins had previously pled guilty to committing health care fraud in connection with a durable medical equipment (DME) scheme. From 2018 to 2023, Riggins paid for doctors’ orders for medically unnecessary DME and tricked doctors into signing DME orders and certificates of medical necessity to bill for it. Despite receiving hundreds of complaints from victims about fraudulent orders, Riggins submitted over $3.8 million in fraudulent claims to Medicare and was reimbursed over $1.8 million. The case was investigated by the U.S. Department of Health and Human Services, Office of Inspector General (HHS-OIG) and is being prosecuted by Trial Attorneys Samantha Usher and Kelly Z. Walters of the Criminal Division’s Fraud Section and Assistant U.S. Attorney Robin McCoy.

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