What should a police officer be like?

He encourages police officers to beat their chest and look over the city and let their kind of metaphorical superhero cake flutter in the wind.

As Black Lives Matter protests continue and as many Americans call for a rethink of how policing should be done,

we look at the philosophy of one of the US's most successful police trainers.

He wants to teach people how to be emotionally and spiritually and psychologically prepared to kill on the job.

You're listening to stories of our times from The Times and the Sunday Times.

I'm David Aromovich. Today, Killology, an American way of policing. Have you resolved in your heart that you were fully prepared to snuff out of human life?

I'm looking at a YouTube video of a rather vigorous man in his late 50s in dark shirt and jeans standing in an

auditorium addressing a seated crowd of mostly men some in uniform many with close

cropped hair.

He's quite animated. And he has a flip chart in front of him

on which he's writing in big blue letters, figures like 98%, 1%, 1%, 1%.

And 1%. An old Vietnam vet, an old red retirement. and one

Vietnam vet, an old retired colonel told me one time, just one sentence and we've run with it ever since.

And it turns out the 98% refers to the number of people in society who he says and he now writes this in red a sheep

98% of it's a sheep. He said most people in our society are sheep.

Decent gentle creatures who can only

heard just by action or extreme provocation.

And then he writes against the other 1%, they're sheepdogs.

And he says, sheep dog, I am a predator too.

He said, I am a predator too.

And now he comes down off the stage

...