Prove that Dzhokhar Tsarnaev is guilty for the Boston Marathon Bombing before sentencing him to death. He's a citizen.

He's a citizen, he deserves a fair trial just as any american would. What if he didn't do it? He allegedly did it, he allegedly wrote that note about why he did it. Get good hard evidence before murdering him. What different are we from him? If he was seeking vengeance for Americans killing Muslims, what different are we for seeking vengeance for a Muslim "allegedly" killing Americans. May I remind you the definition of Vengeance "the act of doing something to hurt someone because that person did something that hurt you or someone else." What different are you than him?