According to the Federal Bureau of Investigation ( FBI ), although the gang makes up less than 1 % of the prison population, it is responsible for up to 21 % of murders in the federal prison system.
According to the Federal Bureau of Investigation ( FBI ), the general definition of spree murder is two or more murders committed by an offender or offenders, without a cooling-off period ; the lack of a cooling-off period marking the difference between a spree murder and a serial murder.
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