Frenn Law Office finally verified address on google and added in some photos to show side entrance.  This is the door to use to enter, this door can be accessed from State Street by walking up the stairs and then going to the left side of the building or by using the walkway from Cass Street.  If you see dumpsters head towards them and then to the right and you’ll see this entrance.

Entrance to Frenn Law Office on side of building.
Entrance to Frenn Law Office on side of building.

Note: on the map below that Cass Street runs up and down or North/South and E State Street runs left to right or West/East. The red star is the entrance.

Overhead Layout
Overhead Layout