Officer Brooks

Officer Brooks is a minor protagonist in The Strangers: Prey At Night. He was called to investigate the 911 call that was made earlier in the film.

The Strangers: Prey At Night:
As Kinsey runs around the park with Dollface following her, she falls in the road as a car pulls up and an officer steps out.

Death
He helps her up and tries to get her to calm down but Dollface walks up behind him and slits his throat.

Trivia

 * His name is not said in the cast list but his name tag says "Brooks" on it.
 * His death scene has way more blood in the unrated version.