The Chicago Police Department (CPD) is the law enforcement agency responsible for maintaining public safety and enforcing laws in the city of Chicago, Illinois. Established in 1835, it is one of the oldest police departments in the United States. The CPD is organized into several districts, each serving specific neighborhoods and communities. The department's primary functions include crime prevention, investigation, and community engagement. Officers are trained to handle various situations, from traffic enforcement to responding to emergencies. The CPD also collaborates with other agencies and community organizations to enhance public safety and build trust within the community.