Harriette Walters, mastermind of a nearly two-decade tax scam that cost D.C. taxpayers almost $48 million, will get 17 years and six months for her crimes, a sentence handed down by federal judge Emmet G. Sullivan. The 52-year-old will also have to make restitution for the $48 million that she stole. In addition, she has to pay $12 million in tax payments to the federal government and $3.2 million to the District. Walters is a former mid-level manager in the D.C. Office of Tax and Revenue who engineered a complicated tax-assessment scam.