Michael Phelps

John J. O'Brien

Last August, John J. O’Brien, who was once a highly regarded and well-liked partner in the celebrated M&A practice of Sullivan & Cromwell, pleaded guilty to four misdemeanor tax offenses. The charges of conviction were mere misdemeanors, but the amounts involved were large, as you’d expect from a well-paid partner at S&C.

O’Brien was accused of failing to file income-tax returns for tax years 2001 to 2008, on almost $11 million in partnership income. In the end, he pleaded guilty to failing to file taxes relating to $9.2 million in partnership income, for tax years 2003 to 2008.

Earlier today, John O’Brien was sentenced. The sentencing hearing provided some interesting additional information about why O’Brien acted as he did.

So is O’Brien trading Biglaw for the Big House? And if so, how long a sentence did he receive?

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