Wouldn't surprise me if some meth manufactures found the place to be fairly empty and was operating out of one of the buildings. Only to get caught shipping product somewhere and the FBI backtracked it to the observatory.
It took 2 years to get a blatant lab shut down on my upper middle-class street. Ex-neighbor's ex-engine mate happened to transfer from FD to our local PD precinct & made detective. He was the only reason the rat nest was disturbed.