At Black's trial, the Supreme Court noted, the jury was told Black and his co-defendants were guilty of honest services fraud if they misused their positions for private gain and "knowingly and intentionally" breached their duties of loyalty to the company.

"We hold, in short, that, by properly objecting to the honest-services jury instructions at trial, defendants secured their right to challenge those instructions on appeal," the Supreme Court said, in a decision written by Justice Ruth Bader Ginsburg.

Black is not totally home free. He still has an obstruction of justice conviction.

Estrada said he would seek to have the obstruction conviction overturned alongside the fraud convictions. The trial jury, Estrada said, would have viewed Black's decision to remove the boxes differently had they concluded he was not guilty of fraud.