Rep. Michael G. Grimm (R-N.Y.) has been secretly indicted by a federal grand jury in Brooklyn, according to people familiar with the case. The indictment is expected to be unsealed in coming days.

A person briefed on the case said Grimm was indicted by a grand jury empaneled in the Eastern District of New York in Brooklyn and that his attorney had been in talks with prosecutors. Grimm’s attorney, William McGinley, confirmed in a phone call Friday that he had been informed of the pending indictment.

McGinley declined to comment beyond a separate written statement.

“We are disappointed by the government’s decision, but hardly surprised,” he said in the statement. “From the beginning, the government has pursued a politically driven vendetta against Congressman Grimm and not an independent search for the truth. Congressman Grimm asserts his innocence of any wrongdoing.”

McGinley added that “when the dust settles,” Grimm “will be vindicated.” Until then, he said Grimm plans to continue serving in Congress.

Rep. Michael Grimm (R-N.Y.) apologized Wednesday for threatening to throw a reporter off a balcony in the Capitol. (Reuters)

House GOP leaders released no statements on the second-term lawmaker’s troubles Friday, while Democrats — who had already identified Grimm as a key target in the November midterms — predicted it would make his reelection more difficult.

The New York filing deadline for candidates has already passed, meaning that Republicans may be stuck with Grimm on the ballot, or without a nominee in November if Grimm steps down before then.

It was not clear Friday what charges are included in the indictment of Grimm, who has faced scrutiny for his business relationships and his campaign finance practices.

A years-long FBI investigation has focused on Grimm and several close associates, including his former girlfriend, Diana
Durand, who was arrested in January. A three-count indictment against Durand was unsealed Friday, charging her with making illegal contributions, making contributions in the name of someone else and making false statements to the FBI, according to court documents.

As a member of Congress, Grimm is expected to be given the opportunity to surrender to the FBI once the indictment is unsealed.

Grimm, 44, was first elected to Congress in 2010 and is a former U.S. Marine and FBI agent — making the ongoing investigation particularly sensitive for both the lawmaker and his former employer.

Questions about Grimm’s campaign finance activities began almost as soon as he won his House seat, but a formal investigation did not begin until 2012. The House Ethics Committee launched an inquiry into Grimm that year, but then announced that it would defer to an ongoing probe by the Justice Department.

The investigation has been run out of FBI offices in New York.

Grimm made national headlines on the night of the State of the Union in January, when he threatened a television reporter who asked about the allegations of wrongdoing. Grimm walked off camera, but then returned and threatened to throw the reporter over a balcony.

Grimm later apologized, saying he was stressed over an ongoing House debate over flood insurance.

Grimm represents a New York City district that includes Staten Island and parts of Brooklyn, and won reelection in 2012 after Hurricane Sandy battered the area. Grimm earned plaudits from constituents for his handling of the storm’s aftermath.

Grimm’s legal troubles appear to have depleted his campaign coffers. According to his most recent campaign finance disclosure report, Grimm had campaign debt of $453,656 at the end of the first quarter of 2014. He has paid roughly $220,000 in legal fees, but owes more than $417,000 in legal expenses dating to 2012.

The Staten Island district has had its share of scandal. In 2008, Rep. Vito J. Fossella (R) saw his political career unravel after a drunken-driving conviction and revelations that he had a secret second family in Virginia apart from his wife and children on Staten Island. Democrat Michael E. McMahon won the seat that year but was defeated by Grimm as part of the 2010 Republican wave.

Grimm is the seventh lawmaker to be indicted while serving in Congress in the past decade. The late senator Ted Stevens (R-Alaska) was indicted on corruption charges, though his conviction was later tossed out because prosecutors withheld evidence from the defense.

Former House majority leader Tom DeLay (R-Texas) was convicted in 2010 of trying to influence Texas elections by funneling corporate money to various candidates. A Texas appellate court overturned the conviction last year, calling the evidence against DeLay “legally insufficient.”

A spokesman in Grimm’s Washington office did not respond to requests for comment Friday. The lawmaker’s last public comment came on Thursday, when he urged constituents to criticize the Department of Housing and Urban Development for making plans to divert federal storm funding intended to help New York area communities.

Adam Goldman, Paul Kane, Julie Tate, Alice Crites and Matea Gold contributed to this report.