HARRISBURG, Pa. (AP) -- An Ohio teacher who was severely injured when a rock was dropped onto her car from an interstate overpass plans to be in a Pennsylvania courtroom for a hearing to determine if three defendants will face trial as adults. Sharon Budd was driving from her home in Uniontown, Ohio, to witness a pretrial hearing Thursday in the criminal case against Keefer McGee, Dylan Lahr and Tyler Porter, who were 17 when the attack occurred last summer. Her husband Randy Budd said they do not believe the cases should be transferred to juvenile court. "No question in my mind," Randy Budd said Wednesday, as he was driving to Pennsylvania to meet up with his wife and other family members. "Seventeen, 18 years old, to be throwing rocks, big rocks, from overpasses into oncoming traffic. I would be irritated, mad, if it went any other way." A fourth defendant, Brett Lahr, turned himself in to jail earlier this month to begin serving time even though the judge has not yet accepted his plea of no contest to conspiracy to commit aggravated assault. The four were arrested shortly after the incident, in which a nearly 5-pound rock crashed through the windshield of the vehicle in which Sharon and Randy Budd had been riding. They were driving through Pennsylvania, late at night, on their way to see a show in New York. Sharon Budd, who taught language arts at Edison Middle School in Massillon, Ohio, has required intensive treatment and a series of surgeries to address severe brain injuries and massive damage to her skull. During a preliminary hearing in August, McGee testified for the prosecution that he and the other three planned to do some damage but did not anticipate they would cause the injuries that Sharon Budd suffered. Union County District Attorney Pete Johnson said the hearing, which could go all day in the Lewisburg, Pennsylvania, courthouse, will include closed-door testimony by an expert for Dylan Lahr. The judge determined that testimony could disclose prejudicial and protected information, Johnson said. Porter's lawyer, Peter Campana, said the judge also has to determine if his client intended to use the rock as a deadly weapon, a finding that would help determine if the case should remain in adult court. In court records, Porter has been quoted as saying he dropped a rock from the overpass above Interstate 80 but did not hit anything, but that Dylan Lahr dropped a rock that did strike a vehicle. "It's our position that Tyler Porter didn't use the rock that he used with that intent," Campana said. "And whatever intent Mr. Lahr may have had, Tyler did not share it with him, as far as using that rock to seriously injury someone." The defendants face charges of aggravated assault, conspiracy, trespassing, propelling missiles into occupied vehicles, agricultural vandalism and reckless endangerment.