Your three things today are:
It was an elite police force. Only very experienced officers could join it.
Only the very best who could enforce the law were accepted.
Their data was taken, all of their contact details put up on the computer system as soon as they entered the force.
Each time a crime was committed, one of them would be called, their data taken off of the computer, and away they’d go to the crime scene to investigate.
It all worked out well, and the police force had a great reputation for being the best in the country.