TEHRAN, Iran (AP) — A former U.S. Marine convicted of criminal charges in Iran after being accused of working for the CIA will appeal for a new trial after already seeing his sentence reduced once, his lawyer said Sunday.

Amir Hekmati, a dual U.S.-Iranian citizen born in Arizona and raised in Michigan, was arrested in August 2011, then tried, convicted and sentenced to death for spying. However, Iran’s Supreme Court annulled the death sentence after Hekmati appealed, ordering a retrial in 2012. The country’s Revolutionary Court then overturned his conviction for espionage, instead charging him with “cooperating with hostile governments” and sentenced him to 10 years in prison.