Several days after the attack, Soliman's wife and five children were taken into ICE custody.

Mohamed Soliman, 45, allegedly used a makeshift flamethrower and Molotov cocktails to set people on fire during a downtown event held in support of Israeli hostages in Gaza.

The suspect in the Boulder firebombing will appear in Colorado court on Thursday, as an attorney for his family, who are in Immigration and Customs Enforcement detention, calls for their release.