What are some police-themed books for young adults set in a dystopian future?

Police books for young adults intrigued by dystopian settings can explore "Legend" by Marie Lu. This novel presents a divided society where a young prodigy, June, from the elite military and a wanted criminal, Day, cross paths. Their intertwined stories uncover government secrets and conspiracies. "Legend" combines elements of action, suspense, and a futuristic police state, making it an exciting choice for readers interested in dystopian themes.