Again neither of those photo are off the employee lounge that is close proximity to those photos. Nor do they look anything like the employee lounge shown in the scrolling photos.
http://firstnationalbankbuilding.com/amenities
You keep linking the employee lounged, however, there has been no indication that's where he was. The only information that we have is that he was supposedly in an "employees-only" area. It could very well be the employee lounge or it could also be the skyway shown in the pictures above.
The bank's lounge also seems to be a separate room within the bank itself and if the bank is anything like any other office building, it's most likely not accessible by the general public unless someone let him into the back area. Whatever the case, we don't really know why the police were called and we probably never will unless First National Bank comes out with a statement.