http://www.telegraph.co.uk/news/worldnews/middleeast/iran/8979220/Iran-seeks-death-penalty-for-American-CIA-spy.html

In a closed court hearing, the prosecution applied for capital punishment, the report said, because the suspect, identified as Amir Mirzaei Hekmati, "admitted that he received training in the United States and planned to imply that Iran was involved in terrorist activities in foreign countries" after returning to the U.S.

The prosecutor said Hekmati entered Iran's intelligence department three times.
The report said Hekmati repeated a confession broadcast on state TV on Dec 18.
Under the Iranian law spying can lead to death penalty only in military cases.