FAWN, Pa. (AP/KDKA) — A high school student who struck and seriously injured a younger teen with a crowbar after the other boy struck him with it first must stand trial on attempted homicide and aggravated assault charges.

A judge made the decision Wednesday after prosecutors argued that the 17-year-old student crossed a line between self-defense and attempted homicide when he didn’t stop the March 3 street brawl in Fawn after disarming the 14-year-old.

READ MORE: Uncertainty Surrounds New Omicron Variant: 'We Don't Have Answers Yet'

His public defender had argued his client’s actions did not rise to that level where those charges were warranted.

READ MORE: 2 Injured After Stabbing In Pittsburgh's Arlington Heights Neighborhood

The 14-year-old was transported to a local hospital and was listed in critical condition last week with severe blunt force trauma to his head.

Investigators say the incident started when the two were on their way home from school on the school bus and were arguing. But authorities have not said what the two boys were arguing about.

MORE NEWS: Labor Secretary Marty Walsh Says Build Back Better Will Help Retrain Workers For Pittsburgh's Jobs Of The Future

(TM and © Copyright 2020 CBS Broadcasting Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)