WASHINGTON — The yearslong investigation of former District of Columbia mayor Vincent Gray shows no sign of concluding anytime soon.
Prosecutors say five people who pleaded guilty to felonies related to Gray's campaign or his benefactor, Jeffrey Thompson, are still cooperating with investigators. Court hearings for Thompson and three others have been postponed from next week to November.
Prosecutors have also asked a judge to postpone a hearing for Eugenia "Jeanne" Clarke Harris, a former close friend and campaign adviser to Gray.
The U.S. Attorney's Office began investigating Gray in March 2011, a few months after he took office. Prosecutors have said he was an aware of an illegal "shadow campaign" that helped him get elected. Gray, a Democrat, has denied all wrongdoing. He rejected a plea deal nearly a year ago.