U.S. Defense Secretary Ashton Carter has decided not to impose further punishment on David Petraeus, a former U.S. military commander and CIA director who admitted sharing classified information with his mistress, according to a letter seen by Reuters.
The short letter was sent by Stephen Hedger, the assistant secretary of defense for legislative affairs, and the decision is in line with an Army review.
Petraeus resigned as head of the CIA in 2012 after it was revealed that he was having an affair with his biographer, Army Reserve officer Paula Broadwell. When he pleaded guilty to mishandling classified information, a court document signed by Petraeus and prosecutors said that in 2011, Petraeus illegally gave Broadwell access to official binders.
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General David Petraeus - CIA
Ex-general, CIA chief David Petraeus to receive no further punishment
This July 13, 2011, photo made available on the International Security Assistance Force's Flickr website shows the former Commander of International Security Assistance Force and U.S. Forces-Afghanistan Gen. David Petraeus, left, shaking hands with Paula Broadwell, co-author of "All In: The Education of General David Petraeus." The Justice Department is dropping its investigation of David Petraeus' mistress, Paula Broadwell, into whether she stalked a romantic rival online. (AP Photo/ISAF)
David H. Petraeus, former army general and head of the Central Intelligence Agency, at at the annual dinner for veterans and ROTC students at the Univerty of Southern California, in downtown Los Angeles Tuesday, March 26, 2013. It marked Petraeus' first public remarks since he retired as head of the CIA after an extramarital affair scandal. (AP Photo/Reed Saxon)
CIA Director nominee Gen. David Petraeus testifies on Capitol Hill in Washington, Thursday,June 23, 2011, before the Senate Intelligence Committee during a hearing on his nomination. (AP Photo/Cliff Owen)
Paula Broadwell, center, participates in the Lake Norman YMCA Triathlon, August 24, 2013, at Lake Norman. Broadwell's affair with then Gen. David Petraeus brought her a wave of public attention. Since the revelation and investigation whether she was privy to classified national secrets Broadwell has shunned publicity. She is beginning a slow reentry onto the public scene in Charlotte. (John D. Simmons/Charlotte Observer/MCT via Getty Images)
Former Director of the Central Intelligence Agency David Petraeus arrives for the Breakthrough Prize in Life Sciences awards Thursday, Dec. 12, 2013, in Moffett Field, Calif. The Breakthrough Prize in Life Sciences recognizes excellence in research aimed at curing intractable diseases and extending human life. The prize is administered by the Breakthrough Prize in Life Sciences Foundation, a not-for-profit corporation dedicated to advancing breakthrough research, celebrating scientists and generating excitement about the pursuit of science as a career. (AP Photo/Ben Margot)
Former Commander of International Security Assistance Force and U.S. Forces-Afghanistan Gen. Davis Petraeus speaks during an armed forces farewell tribute and retirement ceremony at Joint Base Myer-Henderson Hall in Arlington, Va., Wednesday, Aug. 31, 2011. (AP Photo/Susan Walsh)
David Petraeus (L) and Team Rubicon Vice President Will McNulty speak onstage during a fireside chat at the Team Rubicon Salute To Service Awards at Skirball Cultural Center on November 7, 2014 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images)
In this November 4, 2012 photograph, Paula, left, and Scott Broadwell are seen at the Patriot Gala, the annual black tie event at Quail Hollow Club in Charlotte, North Carolina. (Daniel Coston/Charlotte Observer/MCT via Getty Images)
Former CIA director David Petraeus gives a speech at the Institute for National Security Studies during the 7th Annual International Conference at the Tel Aviv Museum of Art on January 28, 2014, in the Mediterranean coastal city of Tel-Aviv. The event runs until January 29. (Photo credit Jack Guez, AFP/Getty Images)
Former CIA director and retired four-star general David Petraeus receives a plaque of appreciation after making his first public speech since resigning as CIA director at University of Southern California dinner for students Veterans and ROTC students on March 26, 2013 in Los Angeles, California. Petraeus apologized in his speech for his actions that lead to him resigning from the CIA. (Photo by Kevork Djansezian/Getty Images)
Former CIA director David Petraeus addresses a University of Southern California event honoring the military on March 26, 2013 in Los Angeles, California. In the first public appearance since stepping down last November as head of the CIA after admitting to an affair, Petraeus said he regretted and apologized for the circumstances that led to his resignation. (Photo credit Frederic J. Brown, AFP/Getty Images)
In the frame grab from C-SPAN Book TV video taken Feb. 6, 2012, author Paula Broadwell speaks to an audience about the book she co-authored, "All In: The Education of General David Petraeus," at the Politics and Prose bookstore in Washington. The scandal that brought down CIA Director David Petraeus started with harassing emails sent by his biographer and paramour, Broadwell, to another woman, and eventually led the FBI to discover he was having an affair, U.S. officials told The Associated Press on Saturday, Nov. 10, 2012. Petraeus quit Friday, Nov. 9, after acknowledging an extramarital relationship. (AP Photo/C-SPAN Book TV)
CIA Director David Petraeus, center, stands with Admiral James A. "Sandy" Winnefeld, Vice Chairman of the Joint Chiefs of Staff, right, before a baseball game between the Washington Nationals and the Miami Marlins at Nationals Park Sunday, Sept. 9, 2012, in Washington. (AP Photo/Alex Brandon)
Holly Petraeus, wife of Army General David Petraeus, left, speaks while Elizabeth Warren, the White House adviser assigned to set up a U.S. consumer financial-protection bureau, listens during a press conference in Washington, D.C., U.S., on Thursday, Jan. 6, 2011. Petraeus was named to establish an office within the new Consumer Financial Protection Bureau dedicated to military personnel and their families. (Photo credit Jay Mallin/Bloomberg via Getty Images)
CIA Director David Petraeus, left, looks out from the reviewing stand as troops pass by on Friday, Aug. 17, 2012, in Fort Campbell, Ky. Petraeus returned to Fort Campbell to celebrate the 70th anniversary of the famed 101st Airborne Division, a unit he once led in combat in Iraq.(AP Photo/Mark Humphrey)
This Aug. 17, 2012 photo shows CIA Director David Petraeus during a ceremony at Fort Campbell, Ky. (AP Photo/Mark Humphrey)
In this January 14, 2012 photo, Paula Broadwell, author of the David Petraeus biography 'All In' poses for photos in Charlotte, North Carolina. Petraeus, the retired four-star general renowned for taking charge of the military campaigns in Iraq and then Afghanistan, abruptly resigned November 9, 2012 as director of the CIA, admitting to an extramarital affair. Petraeus carried on the affair with Broadwell, according to several U.S. officials with knowledge of the situation. (T. Ortega Gaines/Charlotte Observer/MCT via Getty Images)
U.S. Gen. David Petraeus, the top NATO and U.S. commander in Afghanistan, points to a colleague, unseen, during a meeting of the International Contact Group for Afghanistan in Kabul, Afghanistan Monday, June 27, 2011. Representatives from more than 40 nations are attending a meeting of the International Contact Group. The group's 11th meeting comes after President Barack Obama announced last week he was ordering 10,000 U.S. troops home by year's end; as many as 23,000 more are to leave by September 2012. That would leave 68,000 U.S. troops in Afghanistan. (AP Photo/Musadeq Sadeq)
David H. Petraeus, former army general and head of the Central Intelligence Agency, speaks at the annual dinner for veterans and ROTC students at the University of Southern California, in downtown Los Angeles Tuesday, March 26, 2013. It marked Petraeus' first public remarks since he retired as head of the CIA after an extramarital affair scandal (AP Photo/Reed Saxon)
This Aug. 17, 2012 photo shows CIA Director David Petraeus, left, and his wife, Holly, during a ceremony at Fort Campbell, Ky. (AP Photo/Mark Humphrey)
In this Feb. 1, 2009 file photo, Gen. David Petraeus, commander U.S. Central Command, left, stands with his wife Holly before the NFL Super Bowl XLIII football game between the Arizona Cardinals and the Pittsburgh Steelers in Tampa, Fla. Gen. Petraeus, the retired four-star general who led the U.S. military campaigns in Iraq and Afghanistan, resigned Friday, Nov. 9, 2012 as director of the CIA after admitting he had an extramarital affair. (AP Photo/David J. Phillip, File)
Natalie Khawam listens as her attornedy Gloria Allred (not seen) conducts a press conference on November 20, 2012, at the Ritz-Carlton hotel in Washington. Khawam is the twin sister of Tampa, Florida, socialite Jill Kelley and wanted to correct misconceptions about her and her relationship with General David Petraeus and his wife Holly. (Photo credit Paul J. Richards, AFP/Getty Images)
Paula Broadwell leaves her home on Monday, November 19, 2012 in Charlotte, North Carolina. (Photo by James Keivom/NY Daily News via Getty Images)
Paula Broadwell prepares to drop off her two children at school on Monday, November 19, 2012 in Charlotte, North Carolina. (Photo by James Keivom/NY Daily News via Getty Images)
In this January 14, 2012 photo, Paula Broadwell, author of the David Petraeus biography 'All In,' poses for photos in Charlotte, North Carolina. Petraeus, the retired four-star general renowned for taking charge of the military campaigns in Iraq and then Afghanistan, abruptly resigned November 9, 2012 as director of the CIA, admitting to an extramarital affair. Petraeus carried on the affair with Broadwell, according to several U.S. officials with knowledge of the situation. (T. Ortega Gaines/Charlotte Observer/MCT via Getty Images)
Paula Broadwell, left, talks with 'Daily Show' host Jon Stewart, September 3, 2012, in Charlotte, North Carolina, at an afternoon barbeque in Myers Park, a fundraiser for veterans and wounded warriors held at the home of Shannon Lalor and Sami Aasar. (Pam Kelley/Charlotte Observer/MCT via Getty Images)
A September 6, 2011 photo shows General David Petraeus (R) kissing his wife Holly after taking the oath of office as director of the Central Intelligence Agency (CIA) during a ceremony in the Roosevelt Room at the White House in Washington. Petraeus resigned as CIA director on November 9, 2012 after admitting to an extramarital affair with Paula Broadwell. (Photo credit Mandel Ngan, AFP/Getty Images)
In this Nov. 13, 2012, file photo, Jill Kelley leaves her home in Tampa, Fla. U.S. District Judge Amy Berman Jackson says Jill Kelley can press her claim that the FBI and Defense Department violated her privacy when officials allegedly leaked information about her to the news media. Berman also tossed out more than a dozen other claims of government wrongdoing. (AP Photo/Chris O'Meara, File)
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In April, the retired four-star general was sentenced to two years of probation and fined $100,000 but was spared prison time after pleading guilty to mishandling classified information.
The Pentagon could have sought to further reprimand Petraeus under military law.
Hedger's letter was addressed to Senate Armed Service Committee Chairman Senator John McCain and Senator Jack Reed, who had recently asked Carter not to take further action.
The Pentagon declined to comment on the letter.
Petraeus, a counter-insurgency expert with a Princeton University doctorate, served as the top U.S. commander in the wars in Iraq and Afghanistan and was once considered a possible vice presidential or presidential candidate.
Known as "black books," the binders that Petraeus shared with Broadwell contained classified information including identities of covert officers, code word information, war strategy, intelligence capabilities, diplomatic talks and information from high-level White House National Security Council meetings, according to court records.
Petraeus now serves as chairman of the private equity firm Kohlberg Kravis Roberts' captive economic and geopolitical think tank, the KKR Global Institute, according to its website.