federal police
Refers to the federal police force of countries such as the US, Brazil, Australia, etc. Not used for Japan's own police system.
The federal police in the US is called the FBI.
Brazil's federal police cracked down on a drug ring.
警察 is the general term for police, while 連邦警察 specifically refers to a federal-level police force in certain countries.
Compound of 連邦 (federal) and 警察 (police).