Bend School Shooting: Gunman's Home Searched, Shotgun Reportedly Bought by His Mother, Two Wounded Still Hospitalized

Since Thursday's shooting at Silver Rail Elementary School in Bend, Oregon, that killed three children and a teacher, the investigation has moved to the question of how a 16-year-old got a shotgun and a large supply of ammunition.

Police have not answered it. Chief Mike Krantz told reporters Friday that how the suspect got the weapon and ammunition remains part of an active criminal investigation and that he would not address that portion.

The gun and the home search

Krantz said a search warrant has been executed at the gunman's home and the search is continuing. Police believe Griffin J. John II traveled to the school on foot, but his exact movements are still being pieced together.

Police said a Maverick 88 pump-action 12-gauge shotgun was located near the suspect. Multiple sources told ABC News that preliminary information indicates it was purchased by his mother, and multiple law enforcement sources told CBS News the same. Krantz has not confirmed that, and no charges against anyone have been announced.

Police say the teen used three types of ammunition, 12-gauge birdshot, buckshot and slugs, and fired as many as 15 rounds. Krantz said the exact number fired in the classroom is still under investigation. He had approximately 44 remaining rounds of 12-gauge ammunition when he was stopped.

Motive still unknown

Krantz said a motive remains under investigation. "It will require substantial investigative time to continue that, but that is the answer we're seeking as well," he said. "We may never get that full answer, but we want it."

John previously attended Silver Rail Elementary as a special needs student, school officials confirmed. He was not enrolled in the Bend-La Pine district at the time of the attack. The shooting occurred in a special needs classroom, Superintendent Steven Cook said, and all of the victims were shot in that classroom.

The wounded and the dead

Two people were wounded. A 7-year-old child is in serious but stable condition. The 54-year-old teacher suffered serious but non-life-threatening injuries, police said. Her family identified her to CBS News and ABC News as Becky Drury.

Police named the teacher who died as 25-year-old Meghan Lambert and one child as 5-year-old Rhoam Summer. The families of the 8-year-old and the 11-year-old asked that their names not be released yet.

Lambert's family said in a statement read at the news conference: "Meghan was compassionate and had a huge heart. She always fought for the underdog and those with special needs. She was an incredible sister, daughter, niece and granddaughter."

The two who intervened

Police say a different teacher threw her cellphone at the gunman, tackled him and tried to wrestle the shotgun away. She was not hurt. Krantz said she "almost certainly helped prevent more bloodshed."

Kaylub Giamanco, a 36-year-old carpenter and lifelong Bend resident with two daughters at the school, came forward Friday as the bystander who shot the gunman. Police said he kept a .40-caliber pistol legally secured in his vehicle. According to Krantz, he went in through the forced-open doors, heard shooting, saw the teacher struggling with the suspect and fired "multiple times."

The first 911 call came at 12:59 p.m. Officers arrived at 1:02 p.m. and found the suspect already dead.

His family said in a statement that he "is not seeking recognition, but instead wishes to express his gratitude to the first responders, school personnel, and community for the outpouring of love and support."

Reaction from officials

President Donald Trump praised Giamanco on Friday. "It's a terrible thing, but thank goodness for a man that had a gun and knew how to use it," Trump said, calling him a "great hero."

Oregon Gov. Tina Kotek said Thursday that "no parent should have to have this kind of day." She added that the community member who intervened carries "a heavy emotional burden."

Krantz thanked both people who acted. "To the people who showed courage in the face of such violence, and intervened to prevent this tragedy from being any worse, we owe you a debt of gratitude," he said.

What comes next

The home search is ongoing, and police have not said when it will conclude. The open questions are who bought the shotgun, how a 16-year-old came to have it, and why he targeted a classroom at the school he once attended. Krantz has said investigators may never get a complete answer on motive.