CHAMPAIGN, Ill. (AP) — A Champaign teenager has been charged with murder in a weekend shooting at a party near the University of Illinois campus that killed one and injured three other people.

Robbie Patton was arraigned Friday in Urbana. The 18-year-old appeared by video from the Champaign County Jail and barely spoke as the charges against him were read. Patton answered “yes sir” several times as a judge asked him whether he understood the charges.

Patton unexpectedly turned himself in at the jail late Thursday night.

He is charged with first-degree murder in the death of 22-year-old George Korchev Sunday on Green Street, an area near campus known for bars and restaurants. Three other people were injured.

Patton has not entered a plea and was only assigned an attorney Friday afternoon.