Boston, MA (CNN) — The man accused in April's deadly attack at the Boston Marathon headed to court today.
19-year-old Dzhokhar Tsarnaev pleaded not guilty to 30 charges, including the killing of four people.
Survivors and victim's families were expected to attend the hearing.
Tsarnaev is accused of setting off two bombs at the finish line of the Boston Marathon on April 15th.
Prosecutors say he partnered with his older brother to carry out the attacks.
Tamerlan Tsarnaev died after a chase and shootout with police.