noun
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.
アメリカの連邦警察はFBIと呼ばれている。
The federal police in the US is called the FBI.
ブラジルの連邦警察が麻薬組織を摘発した。
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).