New York art dealer Andrew Crispo’s alleged plot to kidnap a bankruptcy attorney’s child is bizarre on its face, but is stranger still considering the scheme threatened the lawyer who helped rescue his business empire from disarray.

In her work for the court-appointed bankruptcy trustee, the former McDermott, Will & Emery lawyer, whose identity is being withheld to protect her child, marshalled so many of Mr. Crispo’s assets and resolved so many disputes that he was set to receive several million dollars even after all creditors were paid, a rare outcome in any bankruptcy.