The teenager accused of stabbing 20 classmates and a security guard at Franklin Regional High School last month waived his right to a preliminary hearing Monday.
The hearing for Alex Hribal, 16, had been scheduled for Wednesday.
Hribal took two knives to school on April 9 and went on a rampage that left 21 people injured. The attack occurred in a first-floor hallway before classes began.
His formal arraignment is scheduled for July 23 on 21 counts of attempted homicide and aggravated assault and one count of possession of a weapon on school property.
Hribal is being held at the Regional Youth Services Center in Hempfield.
This article was written by Channel 11's news exchange partners at TribLIVE.