Leslie Johnson will resign from her seat on the Prince George's County Council effective July 31.
Johnson was first arrested last November along with her husband, former County Executive Jack Johnson, as part of a federal investigation into corruption in Prince George's County government.
Prosecutors allege Jack Johnson told his wife to flush a $100,000 dollar check from a developer down a toilet, as well as hide tens of thousands of dollars in cash in her underwear when federal agents arrived at their home.
He has already pleaded guilty. Leslie Johnson had a plea hearing scheduled in May, but it was cancelled without explanation.
If she pleads guilty to a felony, Johnson must vacate her council seat.