Federal investigators are looking into whether Democratic Rep. Ilhan Omar entered into a fraudulent marriage in 2009 to help a British citizen suspected of being her brother obtain US residency, the NYT reports. Current and former law enforcement officials said a 2016 investigation by the FBI and the Department of Homeland Security uncovered some evidence suggesting that Omar's marriage to Ahmad Noor Saeed Elmi was a sham and that the two may be siblings. However, prosecutors did not file charges, mainly because the alleged offense fell outside the five-year statute of limitations. The Trump administration has now opened the reexamination of the marriage as part of a broader investigation into the Omars family's immigration history, including whether her father provided inaccurate information on immigration documents and whether she qualified for citizenship through him.