About 450 postal police officers work under the U.S Postal Inspection Service in about 20 cities, Albergo said.

Source: https://chicago.suntimes.com/politics/2023/11/29/23978218/usps-postal-service-police-reform-act-durbin-collins

U.S. Attorney Hurwit commended the cooperative efforts of the joint investigation led by the FBI and Homeland Security Investigations, along with IRS-Criminal Investigation, the U.S. Postal Inspection Service, and the U.S. Marshals Service.

Source: https://www.eastidahonews.com/2023/03/5-idaho-family-members-sentenced-to-prison-ordered-to-forfeit-51-9-million-after-running-elaborate-counterfeit-scheme/