The Slow Hustle is a story about corruption and a story about persistence. The HBO documentary, directed by Sonja Sohn, is technically focused on the unsolved murder of Baltimore police detective Sean Suiter. But the story that emerges is a portrait of a police force so weighed down by corruption and other issues that it’s incapable of finding the truth behind what happened to one of its own — raising the question of what function the police serves in our society. The project is Sohn’s second documentary, following the 2017 film Baltimore Rising, which she directed after spending time in Baltimore after the uprising that occurred after Freddie Gray’s death — though it hadn’t originally been her idea to direct that film. Instead, after getting to know some of the activists involved in the u...