His return to prison came after the U.S. attorney's office in Manhattan, which prosecuted Silver's case, said it had notified the Bureau of Prisons that it had opposed Silver's release. The Federal Bureau of Prisons didn’t provide details or a reason for the transfer earlier this week, but Congress gave the Justice Department expanded powers during the coronavirus pandemic to release inmates on furlough and home confinement to prevent them from catching the virus behind bars. Silver’s supporters have said he is in failing health and suffering from multiple medical conditions that make him more susceptible to contracting coronavirus.