The article provides a good summary of the most obvious crimes committed by Wall Street financial organizations and how the ruling class's legal institutions dealt with them.
The settlements themselves were worked out between the banks and their regulators so as to have the maximum public relations effect, creating the appearance that the banks were being held accountable while minimizing the financial impact on the companies. The banks write off the fines—many of which are tax deductible—as part of the “cost of doing business.”
Not only have no top bankers been prosecuted, no major US banks have been broken up or nationalized.