The main two story building is largely caved in and filled with rubble. The lower floor is partially flooded, netting 10 rads if no radiation precautions are taken. The East Boston police evidence terminal is located in the northwestern corner of the top floor. Directly next to the police department is a small garage with some minor random loot.
The Eddie Winter holotape 6 can be found inside the first desk one comes across when going from the ground floor to the second floor. A skeleton is sitting on the ground in the corner of the booth where the desk is located.
The East Boston police station appears only in Fallout 4.