An FBI translator assigned to investigate a German rapper-turned-terrorist instead traveled to Syria to marry him, according to CNN.

Daniela Greene lied to the FBI about her whereabouts and warned her new husband, Denis Cuspert, about the investigation. Cuspert, who rapped under the name Deso Dogg, has been featured in videos for the Islamic State in Iraq and Syria holding severed human heads, CNN reports.

According to the report, Greene realized she had made a mistake just weeks after marrying Cuspert. She then fled back to the U.S., where she was arrested and agreed to cooperate with authorities.

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Prosecutors describe her actions as deserving of "severe punishment," but she was sentenced to just two years in prison. According to an analysis by Fordham University, Americans who are prosecuted for ISIS-related cases received on average 13.5 years in prison.

The FBI says it responded to Greene's actions by taking "several steps in a variety of areas to identify and reduce security vulnerabilities."

Her attorney, Shawn Moore, describer her as "genuinely remorseful."

"She was just a well-meaning person that got up in something way over her head," Moore said to CNN.