BENTON, Ky. (AP) — Students returned Friday to the Kentucky high school where a classmate went on a shooting rampage, killing two teenagers and injuring multiple others in an attack that shook this rural community to its core.

The first school day at Marshall County High School since the attack Tuesday began with an assembly in the gymnasium. The school district notified parents in an email that school would be in session, WPSD-TV reported.

The school reopened after Kentucky State Police said they had finished processing the scene at the school.

The 15-year-old boy accused of gunning down classmates has been ordered held on murder and assault charges as the shaken community where it happened strained to cope with the devastation.

On Thursday, a juvenile court judge found probable cause to keep detaining the teenager as authorities gather evidence to support trying him as an adult for the attack, Assistant Marshall County Attorney Jason Darnall said. Authorities, meanwhile, are hoping to discover why a handgun was turned on a crowd of classmates, all 14 to 18, as they waited for the morning bell Tuesday.

As the legal process began for the suspect, others in the small rural community sought to overcome the shock of Tuesday’s shooting that left two people dead and 21 injured with a show of solidarity. Hundreds gathered amid flickering candles after nightfall Thursday to honor the victims as many wept.

Nearly 300 people, many with faces visibly etched with pain, thronged a park as firefighters raised a large American flag in the crisp night air. Many teens, cupping candles in their palms, hugged and looked on somberly. One girl’s candle shook in her hands as she sobbed, and others cried when another girl sang “Amazing Grace.”

“It always happens somewhere else, you know, but this week it was our community,” said Misti Drew, an organizer of the vigil. With faces aglow from the candles, participants lofted banners and some wore T-shirts embossed with the words, “Marshall Strong.”

Earlier, Vicki Jo Reed painted a “Marshall Strong” sign on a storefront, and reflected on her grandson’s close call.

“This is one of the hardest things for me to ever have to paint,” she said. “Had a grandson that was in the commons area through the whole thing, and he, like all the other kids, is not handling it very good.”

Reed said her grandson is also 15, like the shooting suspect and their two slain classmates, and is haunted by the horror he saw.

“He wakes up to the gunshots every morning,” Reed said.

The mother of Bailey Nicole Holt, who died at the scene, said she got a call from her daughter’s phone but couldn’t hear her.

“She called me, and all I could hear was voices and chaos in the background and she couldn’t say anything,” Secret Holt told WKRN-TV in Nashville. “I called her name over and over and she never responded, so we rushed to the high school and they wouldn’t let us get through.”

Thursday’s closed-door hearing for the suspect began a journey through the criminal justice system that is slightly more complicated than it would be if the suspect were an adult charged with the same crimes. After an initial series of hearings in juvenile court, which is closed to the public and the records sealed under Kentucky law, the case will be presented to a grand jury that next meets Feb. 13.

If the grand jury returns an indictment, the case will move to circuit court and the prosecution would proceed like an ordinary criminal trial. But the boy will have some protections: The law requires that he remain at a juvenile jail, not in the general population of a county facility. And if he’s found guilty at trial, he will not face the state’s most severe sentences.

Kentucky juries can typically recommend a range of sentences, up to death, for adults convicted of murder.

But the U.S. Supreme Court has barred states from sentencing juveniles to death or to life without parole, finding that children should be treated differently because their still-developing brains leave young people prone to poor judgment.

Kentucky has been through this before, when a teenager convicted in a school shooting that drew national attention more than two decades ago was sentenced to life in prison without the possibility of parole for 25 years.

Michael Carneal was 14 in 1997 when he killed three students and injured five at Heath High School in Paducah, not far from Marshall County. Convicted and sentenced in 2001, he’s now 34 and eligible for parole in four years, according to state records.