In this article from the Roanoke paper, the U.S. Marshal for the Western District of Virginia describes the problem of his office's inability to find places to put inmates in connection with criminal cases pending in the W.D. Va. The state prisons are overcrowded, which leads to overcrowding in the local jails, which means no extra space for federal prisoners.
The article says in part:
"According to the State Compensation Board, Virginia jails were built to hold a total of 18,051 prisoners. As of December, they were holding 28,499. In addition, the number of prisoners the Roanoke marshals service is responsible for has more than doubled in the past 11 years."