Yeah, I enjoyed it. It was based upon Baltimore’s homicide unit, not sure if it was filmed there, but I assumed it was. Baltimore was close to D.C. when I lived in No. Va. at the time is was on.
Yes, it was filmed in Baltimore. I came across filming several times. One time in particular I was walking from the parking lot to my office building several blocks away and walked past a small side street. I saw police cars then heard someone yell “Get down! He’s got a gun!” and I dove behind a parked car.
Then I heard someone yell “Cut” and realized, now also noticing the camera crew, that they were filming a scene. I also worked for a cabinetry supply company for a while and the production co was one of our customers.
Yes it was filmed in baltimore. The building that served as their office / HQ was on Thames Street right on the harbor in Fells Point. It is gone now replaced by a luxury hotel owned by Mr Under-Armor.