Former Prince George’s County Executive Jack Johnson admitted in federal court Tuesday to accepting a $100,000 check and up to $1 million in gifts for steering millions of public dollars to crooked developers. Johnson, 62, pleaded to two felony charges, extortion and tampering with witnesses and evidence, uncovered as part of a wide-ranging federal investigation into public corruption in Prince George’s County. He faces 11 to 13 years in prison at his sentencing on Sept. 15.

U.S. Attorney Rod Rosenstein called Johnson’s guilty plea a “milestone” in the six-year probe.