Keefer McGee is charged with aggravated assault and reckless endangerment.
McGee along with Tyler Porter and Dylan and Brett Lahr are accused of deliberately dropping rocks from an overpass over Interstate 80 in White Deer Township.
Sharon Budd of Ohio was struck in the face by one of those rocks.
It smashed through the windshield of the car she was a passenger in.
She has lost an eye and had to undergo surgery to reconstruct part of her brain.
Budd remains in serious condition at Geisinger Medical Center in Danville.