Authorities arrested a man who posed as an FBI agent. He attempted to release a high-profile murder suspect from jail. The event unfolded at the Metropolitan Detention Center in Brooklyn, New York.
Mark Anderson arrived at the facility on Wednesday evening. He claimed he possessed a court order for the inmate’s release. Staff asked for his credentials.
Anderson produced only his driver’s license. He then informed officers about weapons in his possession. A search revealed unusual items.
Officers found a large barbecue fork and a circular steel blade similar to a pizza cutter in his backpack. Anderson announced, “I have weapons in my bag.”
Foiled Attempt and Charges
Prison staff detained Anderson immediately. They verified the paperwork he presented. The documents proved fake. Federal prosecutors charged Anderson with impersonating a federal officer. He faced court on Thursday. The complaint detailed his actions.
Anderson told staff he had paperwork “signed by a judge.” This authorized the release of a specific inmate. Meanwhile sources identified the target as Luigi Mangione. However jail officials contacted the FBI. They confirmed no such agent or order existed. Anderson’s plan failed.
In addition, investigators linked Anderson to Mankato, Minnesota. He traveled to New York for this purpose. Motives remained unclear at the time.
Background on Luigi Mangione
Luigi Mangione sat in custody at the same facility. He faced charges for the murder of UnitedHealthcare CEO Brian Thompson. The shooting occurred in December 2024.
Surveillance video captured the incident. It showed Mangione approaching Thompson on a Manhattan street. He fired multiple shots.
The killing sparked national discussions. Many expressed frustration with the healthcare system. Mangione became a symbol for some. Moreover authorities pursued justice. Mangione pleaded not guilty in both state and federal cases. His detention continued.
Ongoing Legal Proceedings
Federal charges against Mangione included first-degree murder. State charges focused on second degree murder. Trials loomed ahead. Jury selection for the federal trial started on September 8, 2026. No date emerged for the state case yet. Mangione awaited outcomes in jail.
Meanwhile Anderson’s arrest highlighted security concerns. It exposed vulnerabilities in jail protocols. Officials reviewed procedures.
In addition, the event drew media attention. It added another layer to Mangione’s high profile case. Investigations proceeded. Meanwhile authorities emphasized vigilance. They prevented a potential escape. The incident was resolved without further issues.


