Prosecutors working for Jack Smith, the particular counsel who has twice introduced indictments in opposition to former President Donald J. Trump, obtained a search warrant early this yr for Mr. Trump’s long-dormant Twitter account as a part of their inquiry into his try to overturn the 2020 election, in line with court docket papers unsealed on Wednesday.

The warrant, which was signed by a federal decide in Washington in January after Elon Musk took over Twitter, which is now known as X, is the primary identified instance of the prosecutors immediately looking out Mr. Trump’s communications and provides a brand new dimension to the scope of the particular counsel’s efforts to analyze the previous president.

The court docket papers, which emerged from an enchantment by Twitter difficult the decide’s determination to difficulty the warrant, didn’t reveal what prosecutors had been in search of in Mr. Trump’s Twitter account, which the tech firm shut down simply days after the assault on the Capitol on Jan. 6, 2021.

However the papers point out that prosecutors obtained permission from the decide to not inform Mr. Trump for months that that they had obtained the warrant for his account. The prosecutors feared that if Mr. Trump discovered concerning the warrant, it “would critically jeopardize the continued investigation” by giving him “a chance to destroy proof, change patterns of habits, [or] notify confederates,” the papers mentioned.

The existence of the warrant was earlier reported by Politico.

The truth that prosecutors quietly obtained a decide’s permission greater than seven months in the past to see into Mr. Trump’s Twitter account underscores how a lot of the particular counsel’s work could have taken place out of public view. The majority of the investigations into Mr. Trump’s efforts to take care of his grip on energy and into his different federal case — the one associated to his dealing with of labeled supplies — have been performed by federal grand juries, that are ruled by strict secrecy guidelines.

Within the chaotic interval between the election and Jan. 6, Mr. Trump’s Twitter account, which boasted hundreds of thousands of followers, was one of many nation’s most outstanding platforms on social media. That prosecutors requested for a warrant to look the account suggests they had been excited about some nonpublic side of it — although it stays unclear exactly what that was.

As a part of their sprawling investigation, prosecutors have seized cellphones and different digital units from a few of Mr. Trump’s shut aides and attorneys. These embrace a minimum of two individuals recognized as the previous president’s co-conspirators within the indictment in opposition to him filed this month: John Eastman, a lawyer who suggested Mr. Trump on a plan to stress his vice chairman, Mike Pence, into throwing the election his method at a joint session of Congress on Jan. 6, and Jeffrey Clark, a Justice Division loyalist who Mr. Trump sought to put in as performing legal professional common.

The election costs filed in opposition to Mr. Trump accuse him of three overlapping conspiracies to defraud the US, to disrupt the certification of the election at a continuing on the Capitol on Jan. 6, and to deprive individuals of the proper to have their votes counted.