Omar Mateen, Twice Scrutinized by F.B.I., Shows Threat of Lone Terrorists

The son of Afghan immigrants, Mr. Mateen was born in New York in 1986, moved to Florida with his family in 1991 and spent his early years there in the Port St. Lucie area near the state’s east coast. He made friends as a child at a local mosque, and built friendships during slumber parties and basketball games, and playing video games. He bounced between jobs in high school and college. In court documents connected to a 2006 name change — from Omar Mir Seddique to Omar Mir Seddique Mateen — he said he had held eight jobs in about four years, including work as a grocer and as a salesman at a computer store.
He came to the F.B.I.’s attention in 2013, when some of his co-workers reported that he had made inflammatory comments claiming connections to overseas terrorists, and saying he hoped that the F.B.I. would raid his family’s home so that he could become a martyr.
The F.B.I. opened an investigation and put Mr. Mateen on a terrorist watch list for nearly a year.
James Comey, the F.B.I. director, said during a news conference on Monday that agents used various methods to investigate Mr. Mateen, including sending an undercover informant who made contact with the suspect, wiretapping his conversations and scrutinizing his personal and financial records.
They also sought help from Saudi intelligence officials to learn more about his trips to the kingdom in 2011 and 2012 for the Umrah, a sacred pilgrimage to Mecca made by Muslims. More than 11,000 Americans make pilgrimages to Mecca each year, and Mr. Comey said the F.B.I. found no “derogatory” information about his trips.
“Why did he do this?” his father asked. “He was born in America. He went to school in America. He went to college — why did he do that?”
“I am as puzzled as you are.”
NY Times: http://mobile.nytimes.com/2016/06/14/us/politics/orlando-shooting-omar-mateen.html