Credit: Darrow Montgomery

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Just a few years ago, Warren Graves once served as the chief of staff for one of the most powerful men in District government. Now federal prosecutors say he could spend at least six months in prison on tax evasion charges. 

Graves, a longtime District employee who worked in the Marion Barry and Anthony Williams mayoral administrations, finished his career with the city as the chief of staff for Vince Gray administration City Administrator Allen Lew.

Graves also held a little-known side job as a “consultant,” arranging meetings between businesses and city officials. In exchange for arranging the meetings, prosecutors say, Graves received a stream of income from the companies. According to a memorandum filed in court today, prosecutors say that Graves appears to have used his position with the city to give himself a “substantial consulting income.” 

Graves understated more than $500,000 worth of that consulting income, which lead to a tax evasion charge against him in July. In their sentencing memo, prosecutors ask a federal judge to sentence the 74-year-old Graves, who’s facing health problems, to either six months in prison and six months of house arrest, or an entire year of house arrest.

The new court documents don’t explain, however, what Gray shadow campaign financier Jeff Thompson knew about Graves’ side business. In July, the U.S. Attorney’s Office revealed that Thompson helped bring the charge against Graves, but didn’t specify what assistance he provided. 

Graves is set to be sentenced on Oct. 25.