Do you believe in ghosts?

I can't say that I believe in ghosts. Of course, I have no proof either way, but I am skeptical to say the least.
I'm a skeptic myself, or at least I was until opening the bar. The building was built in 1967 as a morgue for the National Guard Armory across the street. It was essentially a collection point for Viet Nam casualties waiting for arrangements to send them home. Once the war wound down, the army sold it and it became a church connected to the senior complex a block away. It has been a bar for 11 or 12 years now and all bar owners and staff from all 3 different clubs talk about "Shadow Man"
No one I know of has ever seen a face but they tell of catching a glimpse of a gray figure, usually described as male just walking past a mirror or just a sense of movement when there's only 1 or 2 people left in the building.
I always said, "Yeah, sure."
Then there was the night the drawer didn't balance. I told Max I would find it and sent him home.
I locked the doors and turned out the lights except for the jar lights over the bar and sat down and finally found a $100 in the stack of 10's. I was banding up cash when I got a glimpse of a shape reflected in a mirror on the wall positioned so that I can see the door from where I was sitting. I asked Max what he forgot and without waiting, told him about the "C" note. I got no answer. Immediately, I put the cash in the beer cooler and dropped the safety on my .40 and walked around the bar talking to no one loud enough so the dead could hear me. I got over to the office door which had been locked with the light out and saw light under the door.
I shouted "Who's in there?" and listened. I tried the door. Locked. I unlocked it and went in low, The room was empty.
I did check toilets the next morning as part of my opening routine. They were just fine.
I put the cash in the safe and got the hell out of there.