Whose Banksy is it?

I've strolled through and around the former Packard Plant for several years. Met scrap traders and trash dumpers, explorers, tourists, gangs of people, gangs of dogs, seen great painted walls and lots of semi-poetic urban scrawls ("What happened to the American Dream? is the one I see by the Grand Boulevard side.) The former plant is close to a mile long--it's easy not to see everything. But keen eyes spotted a wall painting by elusive street artist Banksy--and took it (the movers are part of Detroit gallery/collective 555.) This is either in the great Detroit scrap tradition (finders keepers even if it is on private property) or its a chapter for city lore.

Here are some questions this (re)moval is provoking for me: What is street art removed from the street? Can you move it like a painting on a wall without changing the meaning of the work or the act? Is the move its own act?

Detroit Free Press on Banksy's move