Why was there heroin under the Green Room?
I mean, why hide it there exactly? Why not keep it on his private property?
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http://tapastic.com/series/Dog-of-the-Dead-
An active legitimate business provides good cover for illicit activity.
It provides a reason for people coming and going all day long, stuff getting delivered in and out, electricity consumption beyond residential norms and so on.
Not long ago they discovered a marijuana grow operation inside a maraschino cherry factory in Brooklyn. It was only discovered when environmental investigators were looking for evidence that cherry plant was discharging polluted water and in a search of the building they found the hidden basement area where he was growing.