Congolese Naturalized U.S. Citizen Sentenced to Prison in Scheme to Defraud Federal Benefits

Mbuya J. Ntambwe, a naturalized U.S. citizen from the Democratic Republic of the Congo, was sentenced June 1, 2026, in U.S. District Court for the Northern District of Indiana to 15 months in federal prison for conspiracy to defraud the United States.

The scheme involved the submission of false statements and documents to secure Supplemental Security Income, Social Security Disability Insurance, and Medicaid benefits, per the Department of Justice announcement. Ntambwe pleaded guilty in December 2024 as part of a broader federal enforcement effort targeting fraud against public benefit programs.

Scope of the case centers on one defendant who participated in a multi-person conspiracy. The exact dollar amount of loss is not specified in the charging documents, but the fraud targeted three major federal entitlement programs: Supplemental Security Income, which provided monthly cash assistance to 7.5 million aged, blind or disabled recipients in 2025; Social Security Disability Insurance, which paid benefits to more than 8.8 million disabled workers and their families; and Medicaid, the joint federal-state program that covered health services for roughly 83 million low-income Americans in fiscal 2025.

The sentence changes Ntambwe’s legal status from supervised release to immediate incarceration. He must report to prison on a date set by the Bureau of Prisons. Upon release he faces three years of supervised release and is ordered to pay full restitution.

Federal rules automatically bar individuals convicted of fraud against entitlement programs from reapplying for those benefits for at least three years after completion of sentence.

Downstream, the conviction requires the Social Security Administration and state Medicaid agencies to update their disqualification lists, triggering reviews of any linked claims or household members. The restitution order creates a enforceable debt that federal debt-collection tools can pursue from future earnings or tax refunds.

The case also supplies precedent and investigative leads for additional prosecutions under the same conspiracy statutes, 18 U.S.C. § 286 and § 287.

This marks the latest sentencing to emerge from federal task forces examining fraud in disability and health entitlement programs. The Department of Justice has pursued similar cases in multiple districts since 2023, focusing on naturalized citizens and non-citizens who allegedly used false identity or medical documentation to obtain benefits.