Glengarry Boys' Brigade; namely Warrant Officers, Lieutenants and Brevet Captains. In 1932 Percy Sillitoe, the Chief Constable of the City of Glasgow Police, abolished the traditional custodian helmet and added a new feature to the peaked caps worn by his police officers. This new feature was a black and white chequered cap band based on the dicings seen on the glengarry headress of the Scottish regiments. The diced band, popularly known as the Sillitoe Tartan, later spread to police forces in Australia, New Zealand, and the rest of the United Kingdom, as well as to some other parts of the world,
Police reform in the United States 2015 and 2016 after various controversies, often involving issues of race and allegations of use of excessive force by officers. Chicago's chief was fired after a judge ordered the city to make a video public that showed the shooting of an individual by a police officer, and after public criticism of the city's handling of the video. Baltimore's chief was fired after a citizen died in police custody in controversial circumstances, riots after the death, and amidst a crime surge. After the 2016 shooting of multiple officers in Dallas, Texas during what had been a peaceful protest, there were reports