A leaked police training document tells cadets to be “ruthless killers” and uses quotes from Adolf Hitler.
The documents obtained by Manual RedEye, a news publication in Louisville in the US state of Kentucky, appears to advocate violence and was made by the Kentucky State Police Academy.
The publication reports one of the slides encourages violence to be met with “greater violence”.
Another quotes Hitler, stating: “The very first essential for success is a perpetually constant and regular employment of violence.”
In total, Hitler is quoted three times in the document.
One slide, titled “Violence of Action” encourages people to “be the loving father, spouse, and friend as well as the ruthless killer”.
Police spokesman Lieutenant Joshua Lawson said in a statement he believes the document is about seven to eight-years-old.
“The presentation touches on several aspects of service, selflessness, and moral guidance. All of these topics go to the fundamentals of law enforcement such as treating everyone equally, service to the public, and being guided by the law,” he told the paper.
The document is reportedly no longer used.
Dr Jack Glaser, a professor at the University of California Berkeley who studies police practises, told the paper the use of Hitler in the document is “unfathomable”.
It comes as perceptions of police become increasingly more polarising – particularly in the US.
An African American man was shot 10 times in front of his family by police in Philadelphia on Monday, sparking protests.
It follows the death of George Floyd at the hands of Minnesota police earlier this year.
Do you have a story tip? Email: email@example.com.