[13] In 2023, Sassoon and fellow assistant US attorney Nicholas Roos prevailed in the trial of Sam Bankman-Fried, securing a 25-year sentence for fraud, conspiracy, and money laundering.

[15][16][17] In January 2025, President Donald Trump appointed Sassoon as the acting US Attorney for the Southern District of New York, pending the Senate confirmation of Jay Clayton.

[19][20] On February 12, 2025, Sassoon sent a letter to Attorney General Pam Bondi stating her intent to resign if forced to drop charges for explicitly political reasons.

[19][20][18] Bove accepted Sassoon's resignation the following day, stating that her conduct would be investigated by the Office of the Attorney General, pursuant to Executive Order 14147.

[21][22] When asked, President Trump claimed he did not command the Justice Department to drop Adams' charges, later stating "I don't know if he or she resigned, but that U.S. attorney was fired".