A partner at the defunct law firm Jenkens & Gilchrist was sentenced to 15 years in prison on Wednesday following his conviction in what prosecutors call the largest criminal tax fraud in U.S. history.

Paul Daugerdas, who once ran the firm's Chicago office, had been found guilty by a New York federal jury on charges including conspiracy, tax evasion and mail fraud.

Prosecutors said Daugerdas reaped $95 million from the scheme, which involved fraudulent tax deductions or benefits exceeding $7 billion and $1.63 billion in lost U.S. tax revenue.

Daugerdas was also ordered to forfeit $164.7 million and pay $371 million in restitution with other co-conspirators.