Formal charges have not yet been filed against the man accused of using a syringe to spray an unknown substance on U.S. Rep. Ilhan Omar (D-Minnesota) during her Minneapolis town hall on Tuesday. RELATED: Rep. Ilhan Omar charged at by man, sprayed with unknown substance at town hall meetingA spokesperson for Rep. Omar told 5 EYEWITNESS NEWS she had no known prior contact with Anthony Kazmierczak, 55. The FBI is leading the investigation, a Minneapolis police spokesperson confirmed on Wednesday. Kazmierczak has no recent criminal history in Minnesota and appears to live in Minneapolis, according to court records. I believe the preliminary reports that we have is that what was sprayed on people was not toxic,” said Moriarty.