US prosecutors have accused a former US Air Force officer of espionage for Iran in a costly operation directed against her fellow inmates.
But who is Monica Witt?
Details of her upbringing are unclear, but a previously published FBI poster for missing persons says she was born on April 8, 1979 in El Paso, Texas.
According to a CV on the job website In fact, Ms. Witt joined the Air Force in December 1997. She was based at Offutt Air Force Base and worked as a specialist for Persian Farsi.
Later, from November 2003, she served as Special Agent at the Special Air Force Investigation Bureau (AFOSI) at Andrews Air Force Base, Maryland. On its website AFOSI states that it should "identify, exploit and neutralize criminal, terrorist and intelligence threats to the Air Force, the Department of Defense and the US Government".
A spokesman for the US Air Force told the BBC that she had been released in June 2008 with the technical sergeant. She has received numerous awards, including the Air Medal, which was awarded for "individual exploits or merits".
Ms. Witt left the US military in May 2008 with the rank of technical sergeant. Over the next seven months, she worked as a contractor with Booz Allen Hamilton of Maryland, advising on "Iranian issues" and offering "language and cultural specialization."
From November 2008 to August 2010, she worked as a Middle East Desk Officer for another contractor, Chenega Federal Systems, Virginia. During this position, Ms Witt said she had "monitored, controlled and coordinated the conduct of highly sensitive counter-intelligence operations against foreign intelligence agencies worldwide."
Later, from December 2010 to May 2011, Ms. Witt worked with Amidest in Washington. During her time at the non-profit organization, she "submitted" applications for 60 Iraqi Fulbright candidates to several US universities. "
She has a bachelor's degree from the University of Maryland, a master's degree from George Washington University and a qualification in Persian-Farsi from the Defense Language Institute.
While at George Washington University she published articles on Tajik-Iranian relations and subsidy reform in Iran.
She claims to have lived and worked in countries such as Iraq, Qatar, Jordan, Turkey, the United Arab Emirates, Tajikistan and Iran.
After that, details about their activities and their whereabouts are unclear.
In an undated statement on missing persons, the FBI said Witt had worked as an English teacher in Afghanistan or Tajikistan and has not had contact since 2013.
According to her indictment, Ms. Witt traveled to Iran in February 2012 to attend a conference organized by the New Horizon Organization. The Department of Justice says the event is sponsored by Iran's Revolutionary and seeks to promote "anti-American propaganda."
Ms. Witt allegedly had an "ideological" twist and moved to Iran in August 2013.
After returning to the country this month, she received housing and computer equipment to pass highly classified information to Iranian officials. The information contained information about her former colleagues in US intelligence.
While in Iran, she allegedly converted to Islam during a television segment after identifying herself as a US veteran, and delivered several programs criticizing the US.
In an article published by State Press TV, Ms. Witt attacked "a prevailing culture of tolerance for sexual harassment" within the US armed forces.
For Witt, who is still at large, an arrest warrant was issued.