Mohamed Sabry Soliman has pleaded guilty to murder charges following a lethal firebombing at a pro-Israel demonstration in Boulder that killed one woman.The assailant, an Egyptian national living illegally in the US, meticulously planned the attack for a year to target individuals supporting Israeli hostages in Gaza.Federal authorities are currently considering seeking the death penalty as part of an ongoing hate crime case while the defendant faces a mandatory life sentence for the state murder convictions.