The Hall of Justice over the years was the location of the police department, the health department, a hospital complete with maternity ward, surgery room and emergency room, a meat inspector (not all in the same rooms or at the same time), a City livery and wagon room, a municipal courthouse, judges' and attorneys' offices and a complete jail (there are still bars on some of the windows).
On the fifth floor walk-up you can see the pockmarks caused by bullets that the police used as an indoor shooting range.
Back to the original photograph - there is one ghosties who seemingly decided to get up close and personal (see the largest orb). I also count an orb to my left, another small orb on my jacket and another small orb on my skirt. This was the only image of six taken that show these entities. I did not photoshop this picture and have never had these type of orb objects appear in any of my photos before.
So, tell me, do you believe in ghosts?