Guilty plea on federal charges in deadly Boulder firebomb attack

Mohamed Soliman admitted federal responsibility for a firebombing attack at a peaceful Boulder demonstration. His guilty plea covered 12 charges, including hate crimes, using fire or an explosive during a felony, and carrying an explosive during a felony. The federal case focuses on both the violence and its alleged antisemitic motive.

According to prosecutors, Soliman threw two Molotov cocktails at people attending a Run for Their Lives gathering on the Pearl Street Mall. The group had marched through downtown Boulder every Sunday for more than a year. The attack killed Karen Sorin Diamond and injured more than a dozen other people.

Soliman had already pleaded guilty to more than 100 state charges, including first-degree murder. His federal plea now formally acknowledges the alleged hate-crime element. Federal sentencing is scheduled for January 7, 2027, while prosecutors and defense lawyers requested life in prison plus 50 years.

A federal hate crime is a federal offense in which violence or attempted violence is linked to hostility toward a protected characteristic. Those characteristics can include religion or national origin. The federal charge therefore addresses more than the physical attack. It also addresses the identity-based motive prosecutors say drove it.

In this case, prosecutors said Soliman acted because of the victims’ actual or perceived Israeli national origins and actual or perceived Jewish religion. The federal charges included one hate crime resulting in death, seven involving bodily injury and intent to kill, and another involving attempted injury with an explosive or incendiary device.

The federal case matters because it formally captures the alleged antisemitic motive. U.S. Attorney Peter McNeilly said Soliman pleaded guilty to federal hate crimes because he believed the victims were Jewish and Israeli. Federal sentencing remains pending, with a hearing set for January 7, 2027.

The article reports one death and more than a dozen injuries from the Boulder firebombing attack. Karen Sorin Diamond died from injuries suffered in the attack. Survivors described continuing physical injuries, trauma, and emotional effects, showing that the consequences extend beyond the reported casualty count.

Prosecutors say Soliman threw two Molotov cocktails at a Run for Their Lives demonstration on the Pearl Street Mall. The gathering supported Israeli captives held by Hamas. The federal indictment included 12 charges: hate crimes involving death, bodily injury, attempted injury, and several explosives-related offenses.

Soliman had already received a state sentence of life without parole for first-degree murder, plus 2,128 years for other state convictions. His federal guilty plea adds a separate federal case focused on the alleged hate-based motive. The federal sentencing hearing is scheduled for 10 a.m. on January 7, 2027.

According to the guilty plea and federal prosecutors, the victims were targeted because of their actual or perceived Jewish religion and Israeli national origins. This motive distinguishes the federal case from charges based only on the physical acts. It identifies the hateful ideology prosecutors say caused the violence.

The victims belonged to Run for Their Lives, a group that marched weekly through downtown Boulder in support of Israeli captives held by Hamas. Prosecutors said Soliman threw two Molotov cocktails at the gathering. The attack killed Karen Sorin Diamond and injured more than a dozen others.

U.S. Attorney Peter McNeilly said the federal case holds Soliman responsible for the ideology behind the June 2025 attack. The Anti-Defamation League called it an antisemitic attack aimed at people because they were Jewish. Survivors said the admission was significant, although trauma continues.

The state and federal cases focus on different legal interests. Colorado prosecuted Soliman for more than 100 state charges, including first-degree murder and other offenses. The federal government prosecuted 12 charges centered on hate crimes and the use of fire or explosives during felonies.

That distinction explains why the cases can coexist. A state case can address killing, injuries, and other violations of state law. A federal case can address conduct covered by federal hate-crime and explosives statutes. The same act can therefore support separate charges when it violates both sets of laws. The article presents the federal case as accountability for the hateful ideology behind the violence.

Soliman pleaded guilty to the state charges in May and received life without parole plus 2,128 years. He later changed his federal plea to guilty. The federal judge has not decided the sentence, which is scheduled for January 7, 2027.

The state punishment is already severe: life in prison without the possibility of parole for first-degree murder, plus 2,128 years for the other state charges. That sentence followed Soliman’s guilty pleas to more than 100 state criminal charges. The federal guilty plea creates another sentencing proceeding focused on the hate-crime and explosives offenses.

Federal prosecutors and Soliman’s defense team jointly requested life in prison plus 50 years. The judge said sentencing guidelines are only a guide and may not be followed. The article does not state whether any federal sentence will run concurrently with or after the state sentence, so the final combined effect is not yet known.

The federal sentencing hearing is scheduled for 10 a.m. on January 7, 2027. Until then, the federal punishment remains undecided. The plea itself establishes Soliman’s responsibility for the federal counts, while the judge will determine the sentence.

A guilty plea is legally significant because the defendant admits the charged conduct and accepts conviction without a full trial. The court must still confirm that the defendant is competent and understands the plea. In this hearing, the judge found Soliman competent to plead guilty to every federal count.

A trial verdict comes after prosecutors present evidence and a judge or jury decides whether guilt has been proven. A guilty plea instead resolves the question through the defendant’s admission. It can still lead to sentencing, and the judge may consider the charges and applicable guidelines when imposing punishment. The plea does not itself determine the sentence.

Here, Soliman had previously pleaded not guilty to the federal charges on June 27, 2025. He changed that position at the federal hearing. The judge has not decided his punishment, and sentencing is scheduled for January 7, 2027.