Abu Mansoor Al-Amriki

Omar Shafik Hammami (, Umar Shafīq Hammāmī; 6 May 1984 – 12 September 2013), also known by the pseudonym Abu Mansoor al-Amriki (, ''Abū Manṣūr al-Amrīkī''), was an American citizen who was a member and leader in the Somali Islamist militant group al-Shabaab. A federal warrant for his arrest was issued in 2007. In November 2012, the FBI added Hammami to its Most Wanted Terrorists list.

Omar was raised in a Christian household with an American Protestant mother and a Syrian-born Muslim father. Hammami began to identify as Muslim in high school, after traveling to Syria and meeting his Muslim relatives, and proceeded to drop out of college. After moving to Toronto, Ontario, Canada, and marrying a Somali-Canadian woman in 2004, he traveled with her to Egypt in 2005. He then abandoned his wife and infant daughter to join Al-Shabaab in Somalia in late 2006. They divorced, and by 2009 he had married a Somali woman and had another daughter.

Hammami served as a commander, propagandist, and recruiter. He was rumored to have been killed in March and July 2011 but later appeared again in videos. In December 2012, he defected from Al-Shabaab due to what he referred to as differences in “Shariah and strategy” Al-Shabaab posted a rebuke online of what it called his "narcissistic pursuit of fame."

Hammami was killed by al-Shabaab militants on 12 September 2013. Provided by Wikipedia