POLICE INTELLIGENCE DEPARTMENT警察情报局
police fire department公安消防部门
police affairs department警务司
Police Logistics Department警需局
Police Logistic Department警勤局
Police Administration Department警务部
police e department警察局
people's police force department人民警察局
Los Angeles Police Department洛杉矶警察局;警察局;洛杉矶警署;美国洛杉矶警察局
At a pinch, Criminal custody means police department and people procurator take a temporary and compulsive method to deprive personal freedom of a red-handed culprit or a serious suspect.
刑事拘留，是指公安机关、人民检察院在紧急情况下，对某些现行犯或者重大嫌疑分子，依法决定采用的临时剥夺其人身自由的强制方法。
参考来源 - 论我国刑事拘留制度的完善（研究生论文）N-COUNT-COLL（集体可数名词） A police department is an official organization which is responsible for making sure that people obey the law. 警察局 [美国英语]
...the Los Angeles Police Department.
...洛杉矶警察局。