The Boston Police Department (BPD), dating back to 1838, holds the primary responsibility for law enforcement and investigation within the city of Boston, Massachusetts. It is the oldest municipal police department in the United States. The BPD is also the 20th largest law enforcement agency in the country.

East Boston, nicknamed Eastie, is a neighborhood of Boston, Massachusetts, United States that was annexed by the city of Boston in 1637. Neighboring communities include Winthrop, Revere, and Chelsea. It is separated from the Boston neighborhood of Charlestown and downtown Boston by Boston Harbor. The footprint of the East Boston neighborhood as it is known today was created in the 1940s by connecting five of the inner harbor islands using land fill. Logan International Airport is located in East Boston, connecting Boston to domestic and international locations.