Brooklyn, New York - A Minnesota man was arrested Wednesday evening after an incident at the Metropolitan Detention Center in Brooklyn in which he allegedly posed as an FBI agent in an effort to obtain the release of a federal detainee, according to a criminal complaint filed in federal court.
The defendant is identified in court papers as Mark Anderson, a resident of Mankato, Minnesota. Authorities allege Anderson arrived at the detention center carrying a pizza cutter and claimed to possess a court order authorizing the release of Luigi Mangione, who is being held pending trial.
Federal prosecutors have charged Anderson with impersonating an FBI agent. Court filings indicate he is scheduled to appear in federal court on Thursday. The complaint lodged in federal court provides the primary public account of the events leading to his arrest.
Luigi Mangione, 27, is awaiting trial on allegations related to the 2024 killing of UnitedHealthcare CEO Brian Thompson. While in custody at the Metropolitan Detention Center, Mangione has been the recipient of an outpouring of public attention. Records and the complaint note that Mangione has received monetary contributions to a legal defense fund, in addition to a steady stream of written correspondence. Authorities have documented that the facility received letters, books, and personal photographs sent to him while he has been detained.
The charges against Anderson are limited to impersonating an FBI agent as set forth in the federal complaint. The complaint and subsequent charging documents form the basis for the current prosecution, and court appearances will proceed pursuant to the federal docket.
Case status and next steps
- Anderson faces federal charges of impersonating an FBI agent and is due in court Thursday, according to federal prosecutors.
- Mangione remains in federal custody pending trial on charges tied to the 2024 death of Brian Thompson.
- The criminal complaint filed in federal court is the source document outlining the allegations against Anderson.
This account is based on the contents of the criminal complaint and statements from federal prosecutors. Where details are limited in the complaint, this report reflects those limits rather than expanding beyond available information.