The Department of Justice was dealt a setback in the bid to revive the case against former FBI Director James Comey after a federal judge blocked them from using evidence belonging to his former lawyer and law professor, Daniel Richman.

Richman, who would have been a likely witness to testify before the Comey indictment was tossed late last month, asked the U.S. District Court for the District of Columbia earlier this week to block the DOJ from accessing his online accounts and electronic devices seized from him over five years ago.