There is a scene where a man strips down (bare ass is shown) to be beaten with a baton.

Bare Chested men seen throughout

A man is stripped then beaten severely with a baton.

Someone is shot and killed. You only see their lifeless bloody body afterwards. Nothing too graphic.

Men a transported to a "boot camp" where they are beaten daily

Someone is shot and killed. You see the bullet wound and a chunk of meat sticking to a chair where they sat