Update: Boston Marathon Bombing Suspect Pleads Not Guilty

Boston Marathon bombing suspect Dzhokhar Tsarnaev has entered a plea of not guilty today at his arraignment.

In his first public appearance since his arrest, Tsarnaev plead not guilty to all 30 charges against him stemming from the Boston Marathon bombings.

The April bombing left three people dead and injured more than 200 others. Many of the 30 charges against Tsarnaev could result in the death penalty if he is found guilty.