DENVER (AP) — It opens with a warning: This video contains footage from real police body cameras. Viewer discretion is advised.

Then, an introduction: "I would like you to hear from me, what happened," Douglas County Sheriff Tony Spurlock says, facing the camera.

The next eight minutes provide a carefully edited glimpse of the events that led to a 29-year-old deputy's Dec. 31 death inside an apartment complex south of Denver.

The video posted Jan. 8 on the department's social media accounts is punctuated by gunshots and shouts of panic and pain, and undoubtedly illustrates the danger Deputy Za...