I was watching a documentary on the 50th anniversary of BBC2 and a Danny Boyle produced drama from 1989 called Elephant was mentioned.
Wiki says:
"The film, which contains very little dialogue, depicts eighteen murders and is partly based on actual events drawn from police reports at the time. It is shot with 16mm film with much of it filmed using a steadicam and features a series of tracking shots, a technique the director used regularly. The grainy 16mm film, together with the lack of dialogue, plot, narrative and music give the film a cold, observational documentary feel. Nothing is learnt about any of the gunmen or victims. Each of the murders are carried out calmly and casually, in one scene the gunman is seen to drive away slowly, even stopping to give way for traffic. The victims are shown for several seconds in a static shot of the body.
As with several of Clarke's films, "Elephant" received high praise and attracted controversy. After watching the film, Clarke's contemporary David Leland wrote "I remember lying in bed, watching it, thinking, "Stop, Alan, you can't keep doing this." And the cumulative effect is that you say, "It's got to stop. The killing has got to stop." Instinctively, without an intellectual process, it becomes a gut reaction."
I can only add the locations make Fargo look like the Côte d'Azur. and it's shocking in the mundane awfulness of the crimes.
Available in five not very long parts on Youtube now. Search for Elephant 1989, or else you get... Elephants.