A woman involved in the grand jury investigation of Karen Read has agreed to plead guilty to a federal charge for leaking confidential information. Jessica Leslie, who served on the grand jury, was accused of willfully disobeying court rules that protect grand jury proceedings from public disclosure.

Court documents filed Tuesday reveal that Leslie disclosed the names of witnesses and details of their testimonies while the information was still under seal. Federal prosecutors stated that this breach of confidentiality occurred despite clear legal prohibitions against such disclosures.

While the documents did not explicitly name Leslie as a juror in the Read case, sources confirmed her involvement to ABC News. Karen Read was acquitted of murder charges last month in connection with the death of her boyfriend, John O'Keefe, a police officer.

Read was indicted by a Boston grand jury in June 2022 after prosecutors alleged that she struck O'Keefe with her car following a night of heavy drinking in January 2022. They claimed she left him to die outside a fellow officer's home during a severe blizzard.

The first trial ended in a mistrial last year when the jury could not reach a unanimous verdict. In a subsequent trial that concluded last month, Read was found not guilty of the most serious charges, including murder and manslaughter. However, she was convicted of operating under the influence of liquor and received a sentence of one year of probation.

As part of her plea agreement, Leslie accepted a sentence of one day in prison, which has already been served, along with 24 months of supervised release. A hearing to formalize the plea has not yet been scheduled.

Federal prosecutors did not disclose how they became aware of Leslie's leaks. However, sources indicated that authorities had been monitoring social media and other communications related to the high-profile case.