School stabbing note made by a 16-year-old male who allegedly stabbed and injured 21 people has been revealed. Alex Hribal is the name of the teenager, and he reportedly made a school stabbing note three days before his stabbing spree.

According to reports, Alex Hribal made the school stabbing note before he killed 21 people in his high school. The school stabbing note is reportedly an angry note about the "precious lives" he would take.

The 16-year-old boy who made the school stabbing note reportedly wounded 21 people at his Pennsylvania high school. On Friday, he was charged with as many counts of attempted homicide.

According to court documents, the school stabbing note revealed that Hribal described the "helpless looks" he wanted to see on his victims' faces as he stabs them.

The school stabbing note was created April 6 and it was quoted in an affidavit filed at the second arraignment of Alex Hribal. Hribal, the teenager who conducted a stabbing spree in his high school and who made the school stabbing note has already faced four charges of attempted homicide for his stabbing spree on April 9 at the Franklin Regional High School in Murrysville near Pittsburgh.

According to an affidavit obtained by Reuters, the school stabbing note said:

"I can't wait to see the priceless and helpless looks on the faces of the students of one of the 'best schools in Pennsylvania' (when they) realize their precious lives are going to be taken by the only one among them that isn't a plebeian."

The affidavit also on the school stabbing note also detailed how vice principal Samuel King grabbed Hribal from the back while potential victims and students of the school ran away in panic.

According to the vice principal, Hrival didn't want to let go of the knives and even said, "No, I am not dropping them, my work is not done, I have more people to kill."

Hribal reportedly signed and dated the school stabbing note three days before he stabbed his classmates with two 8-inch steel kitchen knives. The affidavit also said that Hrival injured 20 students and one security guard. Not all contents of the school stabbing note has been revealed to the public.

Hribal's lawyer, Patrick Thomassey, said that despite his note, the teenager was "remorseful" after he attacked his classmates. However, Hrival did not further comment to Reuters on Friday.

Thomassey speculates and told the CBS Pittsburgh affiliate however that bullying may be the reason for the stabbing spree.

School stabbing note revealed disturbing thoughts of a 16-year-old.  Hribal has been charged as an adult on all counts. First arraigned on April 9, he is also facing 21 charges of aggravated assault and a charge of possessing a weapon on school property. It is expected that stabbing sprees do not continue to happen in the country as charges are proving the justice system on alert in such cases.