Former CIA Director John Brennan Subpoenaed to Testify Before Florida Grand Jury in Expanding DOJ Probe

The former intelligence chief has been ordered to appear October 15 as federal prosecutors examine allegations surrounding investigations of Donald Trump, including the 2016 Russia inquiry.

 

 

Former CIA Director John Brennan has been subpoenaed to testify before a federal grand jury in Florida, escalating a Justice Department investigation into whether former intelligence and law-enforcement officials conspired against President Donald Trump.

Brennan’s attorney, Ken Wainstein, disclosed the subpoena in a court filing Monday, saying prosecutors directed Brennan to appear October 15 before a grand jury sitting in Fort Pierce, Florida.

The subpoena is tied to a broad Justice Department inquiry examining claims that officials involved in investigations of Trump over the past decade acted together to deprive him of protected civil rights.

According to Brennan’s lawyer, the Florida investigation reaches beyond the 2016 Russia inquiry and also touches matters connected with the FBI’s 2022 search of Trump’s Mar-a-Lago estate for classified records.

That makes the development more significant than an ordinary witness request: a grand-jury subpoena compels testimony and signals that prosecutors are using formal investigative powers while considering whether criminal charges are warranted.

Brennan has not been charged with a crime. His legal team has repeatedly denied wrongdoing and argues that the investigations targeting him are politically motivated and potentially amount to vindictive prosecution.

The former CIA director is also a target of a separate Washington-based investigation examining whether he made false statements to Congress during closed-door testimony in 2023 about the intelligence community’s Russia assessment.

That allegation stems from disputes over Brennan’s description of how the 2017 Intelligence Community Assessment was prepared, including questions about the handling and relevance of material associated with the Steele dossier.

In October 2025, Republican leaders of the House Judiciary Committee referred Brennan to the Justice Department, alleging that portions of his 2023 congressional testimony were knowingly false. Brennan disputes that accusation.

The underlying 2017 intelligence assessment concluded that Russia conducted an influence campaign targeting the U.S. presidential election and that Moscow sought to damage Hillary Clinton while improving Donald Trump’s electoral prospects.

A bipartisan Senate Intelligence Committee review later said the assessment was a sound intelligence product and found that analysts involved in its preparation reported no politically motivated pressure to reach their conclusions.

Special Counsel Robert Mueller separately concluded that Russia interfered in the 2016 election, but his investigation found insufficient evidence to charge a broader criminal conspiracy involving the Trump campaign and the Russian government.

Those earlier findings are important because the current Justice Department inquiry appears to be testing a different theory: whether government officials themselves unlawfully coordinated investigations and other actions directed at Trump.

Earlier this year, federal prosecutors issued subpoenas in a Brennan-related investigation in Washington, then quickly withdrew them and sought voluntary interviews instead, highlighting the shifting strategy surrounding the investigation.

The probe expanded again this month when prosecutors issued new grand-jury subpoenas in Florida, moving from voluntary questioning toward compelled sworn testimony from former government officials and other potential witnesses.

Another unusual element is the timing. Joe diGenova, the veteran prosecutor who had been helping lead the broader inquiry, resigned from his Justice Department position around the time Brennan’s subpoena was delivered.

Justice Department officials have not publicly announced criminal charges arising from the broader inquiry, and grand-jury proceedings are secret, meaning many details about evidence, witnesses and prosecutorial theories remain unavailable.

Brennan has meanwhile asked a federal court to require the government to preserve investigative records, arguing that those materials could be important if he later challenges any prosecution as selective or retaliatory.

For now, the subpoena does not establish guilt and does not mean an indictment is inevitable. It does, however, represent a significant escalation because Brennan is being compelled to appear under oath.

The central question is therefore not simply whether Brennan has information about Trump, but whether prosecutors can substantiate a legally viable criminal theory involving past intelligence and law-enforcement investigations of the president.