https://www.theguardian.com/law/2014/jun/24/military-us-police-swat-teams-raids-aclu
The Swat team that burst into the Phonesavanh’s room looking for a drug dealer had deployed a tactic commonly used by the US military in warzones, and increasingly by domestic police forces across the US. They threw an explosive device called a flashbang that is designed to distract and temporarily blind suspects to allow officers to overpower and detain them. The device had landed in Bou Bou’s cot and detonated in the baby’s face.
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Swat teams were a late 1960s invention that emerged out of the Los Angeles police department. Initially, they were designed to help officers react to perilous situations such as riots, hostage taking and where an active shooter was barricaded into a house.
But they have developed into something entirely different. The ACLU survey found that 62% of Swat team call-outs were for drug searches. Some 79% involved raids on private homes, and a similar proportion were done on the back of warrants authorizing searches. By contrast, only about 7% fell into those categories for which the technique was originally intended, such as hostage situations or barricades.
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Research by Peter Kraska, a professor at Kentucky University, has tracked the
exponential growth in the use of paramilitary tactics in the US. In the 1980s there were as few as 3,000 Swat raids a year, but by around 2005 that number had leapt to 45,000.
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The amount of equipment handed over can be substantial. North Little Rock police force in Arkansas, for instance, was granted 34 automatic and semi-automatic rifles, two MARCbot robots from Afghanistan that can be weaponised, helmets for ground troops and a tactical armoured vehicle.
Armoured personnel carriers, or APCs, have proliferated dramatically under the 1033 programme. About 500 law enforcement agencies believed to have received military vehicles built specifically to resist roadside bombs. The local police for Ohio state university even has an APC for use on American football match days.
Once the equipment has been handed over, the temptation is to use it. That certainly was the case for the mayor of Peoria, Illinois, who in April
sent a Swat team to search the house of someone who had poked fun at him in a satirical Twitter account.