Former CIA Director John Brennan Subpoenaed in Florida Grand Jury Probe

On October 15, former CIA chief John Brennan is slated to appear before a grand jury in Fort Pierce, Florida. The summons arrived just hours after the case’s lead prosecutor, former U.S. attorney Joe diGenova, walked away from the investigation, leaving a trail of unanswered questions.

DiGenova’s resignation, confirmed to CBS News, was reportedly linked to growing friction between senior Justice Department officials in Washington over how the probe was being run. No official comment was offered on the reasons behind his departure.

According to a sworn statement filed by Brennan’s attorney, Kenneth L. Wainstein, the subpoena was signed by diGenova before he left. It orders Brennan to show up at the Fort Pierce grand jury on Oct. 15.

In a phone call the day after the subpoena, Brennan’s lawyers spoke with Kurt Olsen, another prosecutor on the case. Olsen told the team that Brennan is currently a “subject” in a broader “grand conspiracy” investigation that examines whether officials from the Obama and Biden administrations conspired to strip former President Donald Trump of his civil‑rights protections, effectively keeping him out of public office.

Olsen also hinted that Brennan is a “target” in a narrower inquiry into whether he misled Congress about the intelligence community’s assessment of Russian interference in the 2016 election. Both the subject and target designations are jargon the Justice Department uses to indicate the level of evidence prosecutors believe they have.

The grand‑jury probe, according to the prosecutors, could involve “issues at Mar‑a‑Lago and beyond,” suggesting a far‑reaching look at alleged political machinations. The legal team for Brennan, however, maintains that the investigations are nothing more than a politically motivated witch hunt.

In a recent filing, Wainstein asked U.S. District Judge Jia Cobb for a preliminary injunction, arguing that the threat of prosecution is “quite real” and that the Justice Department has made “intentional efforts” to conceal possible misconduct. He cited diGenova’s sudden exit and the removal of the lead career federal prosecutor in April as evidence of a concerted campaign against Brennan.

The Justice Department’s own counsel, Jeremy Newman, countered that there is no indictment, no charges, and thus the court should deny Brennan’s request to intervene. Judge Cobb has not yet issued a ruling, noting she will consider the arguments before making a decision.

Attorney General Todd Blanche, speaking to CBS News, insisted the “grand conspiracy” probe will march on regardless of diGenova’s departure. He declined to discuss why the prosecutor left, but stressed that “one person doesn’t define an investigation.” When pressed about any potential slowdown, Blanche replied, “Nobody is slowing down any investigations.”

As the legal battle unfolds, Brennan’s lawsuit against the Justice Department alleges that the probes are driven by political bias and seeks an order to preserve records and communications of senior DOJ and White House officials. The outcome could set a precedent for how high‑profile political investigations are conducted in the future.