On top of everything Lehman Brothers did before it collapsed in 2008, nearly toppling the financial system, it now seems that it was aggressively massaging its books.

Of course, many colossal bankruptcies involve bad accounting. But a new report on the Lehman collapse, released last week and described in an article in Friday’s Times, would leave anyone dumbstruck by the firm’s audacity  and reminded of the crying need for adult supervision of Wall Street.

The 2,200-page report was written by Anton R. Valukas, a former federal prosecutor who was appointed by the Justice Department as an examiner for the Lehman bankruptcy case. According to the report, Lehman engaged in transactions that let it temporarily shift assets off its books and in so doing, hide its reliance on borrowed money.

The maneuvers, which Mr. Valukas said were “materially misleading,” made the firm appear healthier than it was. He wrote that Richard S. Fuld Jr., Lehman’s former chief executive, was “at least grossly negligent,” and that Lehman executives engaged in “actionable balance sheet manipulation.”