WASHINGTON — The Justice Department has decided not to charge David Petraeus’s mistress, Paula Broadwell, with cyberstalking as part of its investigation into an e-mail scandal that led to the resignation of the CIA director and storied general.
Broadwell’s lawyer, Robert Muse, received a letter from US Attorney Robert O’Neill that said no federal charges will be brought in Florida related to ‘‘alleged acts of cyberstalking.’’
Petraeus resigned as CIA director in November after acknowledging the extramarital affair, which was exposed after Broadwell e-mailed Tampa socialite Jill Kelley, allegedly warning Kelley to stay away from Petraeus and General John Allen, the US commander in Afghanistan.
Kelley reported the e-mails to the FBI, triggering an investigation that led the FBI to Kelley’s e-mails to the married Allen, who is now under investigation by the Pentagon’s inspector general.
‘‘The decision on whether to bring a prosecution is always a serious matter, and one that should never be undertaken without the most thoughtful deliberation,’’ said Justice Department spokesman William C. Daniels.
A spokesman for Broadwell said she and her family are ‘‘pleased with this decision and pleased that this is resolved.’’
Her attorney has not been notified that she is the subject or target of any other Justice investigation.
Broadwell, Petraeus’s biographer and a reserve Army officer, is still being investigated by the Pentagon for allegedly mishandling classified information. FBI investigators found a ‘‘substantial amount’’ of material marked classified at her home. The documents were part of her research from her trips to interview Petraeus and his commanders across Afghanistan for her best-selling book on Petraeus, ‘‘All in,’’ cowritten with the Washington Post’s Vernon Loeb.
Petraeus told friends that he had never given classified information to Broadwell, and she said she did not receive such material from Petraeus.
Petraeus and Broadwell said their romance began only after he retired from the military and started at the CIA.
The CIA is investigating Petraeus’s conduct to examine whether he may have used CIA resources to further the affair, but the Pentagon has shown no appetite for recalling Petraeus to active duty to punish him for adultery, which is illegal under military law.