Mosab Hassan Yousef (Arabic: مصعب حسن يوسف; now known as Joseph; born 1978 (age 32–33)) is a Palestinian and son of a Hamas founder and leader Sheikh Hassan Yousef. From 1997 to 2007, he worked undercover for Israel’s internal security service Shin Bet, which considered him its most valuable source within the Hamas leadership. In March 2010, he published his autobiography entitled “Son of Hamas”. Yousef has since converted to Christianity and moved to California. His request for political asylum in the United States was granted pending a routine background check on June 30, 2010.