A Libyan man who assisted an Islamist militia that stormed the U.S. Consulate in Benghazi in 2012 was sentenced to 19 1/2 years in prison.

Mustafa al Imam, 47, was convicted in June of conspiring to support terrorists and destroying government property. The jury was deadlocked on other charges, including murder charges related to the deaths of U.S. Ambassador Christopher Stevens and three other Americans.