Carter Page, the former Trump campaign adviser, has filed a federal lawsuit alleging he was the victim of “unlawful spying” throughout the FBI’s Russia investigation. The suit alleges that the Department of Justice and FBI made multiple errors in their applications to the Foreign Intelligence Surveillance Court for a warrant to monitor Page. At the time Page was a suspected Russian agent.

In reports from The Hill:

“Since not a single proven fact ever established complicity with Russia involving Dr. Page, there never was probable cause to seek or obtain the [Foreign Intelligence Surveillance Act] FISA Warrants targeting him on this basis,” the case alleges.

The case also claims that Page has suffered as a result of his involvement in the Russia probe, according to the case. Page alleges that he has suffered economic losses, experienced death and kidnapping threats, and damage to his reputation, according to the law suit.

Page’s complaint also accuses the FBI of relying heavily on the information provided in the Steele Dossier — a collection of information provided by former British spy Christopher Steele.

Steele’s research into the Trump campaign’s alleged ties with Russia in 2016 was funded by Democrats.

Defendants named in the lawsuit include former FBI Director James Comey and former FBI Deputy Director Andrew McCabe. Page acted as a contact for the CIA from 2008 to 2013 In the lawsuit, he also alleges that the FBI mislead the surveillance court regarding his relationship with the agency. Page was never charged as a result of the Russia investigation.