police; police officer

constable; police officer

to warn; to admonish

police

police detective

to sound an alarm; to report sth to the police

criminal police (abbr. for 刑事警察[xing2 shi4 jing3 cha2])

police patrol; patrol officer; (old) police officer

SWAT (Special Weapons And Tactics); riot police; abbr. for 特種警察|特种警察[te4 zhong3 jing3 cha2]

bailiff