** Royal Canadian Mounted Police — accorded the status of a regiment of Dragoons in 1921 and remained so until 1937.

** Police dog

** Community Safety, Enforcement and Policing, responsible for tackling fare evasion on buses, delivering policing services that tackle crime and disorder on public transport in cooperation with the Metropolitan Police Service's Transport Operational Command Unit ( TOCU ) and the British Transport Police.

** Federal Police Force

** A federal judge sentences Los Angeles Police Department officers Stacey Koon and Laurence Powell to 30 months in prison for violating motorist Rodney King's civil rights.

** Angie Dickinson, American actress ( Police Woman )

** Reinhard Heydrich, chief of the Security Police, sent a directive, the Schnellbrief, explaining that Jews living in towns and villages in the Polish occupation zones were to be transferred to ghettos, and Jewish councils – Judenräte – would be established to carry out the German authorities ’ orders.

** Wilhelm Rediess, SS and Police Leader of Nazi-occupied Norway ( suicide ) ( b. 1900 )

** Ernst Kaltenbrunner, German Nazi Police General ( b. 1903 )

** Police seal off Brixton in South London after another night of protests against the poll tax.

** J. D. Tippit, American police officer with the Dallas Police Department ( b. 1924 )

** Vietnam War: A Viet Cong officer named Nguyễn Văn Lém is executed by Nguyễn Ngọc Loan, a South Vietnamese National Police Chief.

** Winnipeg General Strike: Royal Northwest Mounted Police fire a volley of bullets into a crowd of unemployed war veterans, killing two.

** The Chicago Police Department shoot and kill ten unarmed demonstrators in Chicago in what is known as the Memorial Day massacre.

** The Canadian Parliament establishes the North-West Mounted Police ( which is renamed the Royal Canadian Mounted Police in 1920 ).

** Police find a girl's body on Saddleworth Moor near Oldham in Lancashire.

** Police discover the body of Sylvia Likens in Indianapolis, Indiana.

** Greater Manchester Police recover the body of 16-year-old Pauline Reade from Saddleworth Moor, after her killers Ian Brady and Myra Hindley helped them in their search, almost exactly 24 years since Pauline was last seen alive.

** Greater Manchester Police announce that they are to search for the bodies of 2 missing children ( who both vanished more than 20 years ago ) after the Moors Murderers Ian Brady and Myra Hindley confess to 2 more murders.

** In Namibia, fighting erupts between SWAPO guerillas and the South West African Police, on the day that a cease-fire was supposed to end the South African Border War according to United Nations Security Council Resolution 435.

** Riots break out between New South Wales Police and Aboriginal residents of Redfern, New South Wales, a suburb of Sydney, Australia.

** Peel Regional Police