The friend, who requested anonymity, showed the text message to Reuters on Saturday. The suspect, Mohammod Youssuf Abdulazeez, a 24-year-old Kuwaiti-born naturalized U.S. citizen, was killed in a gunfight with police. Abdulazeez's friends said he returned from a trip to Jordan in 2014 concerned about conflicts in the Middle East and the reluctance of the United States and other countries to intervene.