police procedural

US /pəˈliːs prəˈsiːdʒərəl/
UK /pəˈliːs prəˈsiːdʒərəl/
"police procedural" picture
1.

a genre of fiction, film, or television that focuses on the investigation of a crime by police officers, often detailing the step-by-step process of police work

:
She enjoys reading police procedural novels that delve into forensic details.
The new TV series is a gritty police procedural set in New York City.