From breitbart.com:

A jihadist who pleaded guilty to going on a stabbing spree at the Mall of America in Bloomington, Minnesota entered the U.S. as a legal immigrant with foreign relatives.

The Department of Homeland Security (DHS) confirmed to Breitbart News in a statement that 20-year-old Mahad Abdiaziz Adbiraham entered the U.S. as a “derivative of a relative,” which is immigration lingo used to describe a foreign-born resident who came to the country either as the immediate child or spouse of a legal immigrant.

http://www.breitbart.com/big-government/2018/02/05/jihadist-responsible-for-mall-of-america-stabbing-spree-entered-u-s-with-foreign-relatives/