A suspect is in custody, police said.
Mohamed Soliman, 45, appeared in federal court in Denver for his arraignment after being indicted on a dozen federal charges in connection with the June 1 attack.
The attack in Boulder comes less than two weeks after a Jewish couple was killed outside the Jewish Capital Museum in Washington, D.C.
The Illinois State Supreme Court has dismissed Jussie Smollett's conviction for lying about a hate crime in a ruling issued Thursday.
The vandalism was discovered spray-painted onto a woman's fence in Lawnside. It included a racial slur and offensive imagery.
"I felt violated," said Dawn Hines. "I still feel violated."