Officials did not confirm the name of the father who intervened and fatally shot the suspect.
But Kaylub Giamanco’s family has identified him to US media as the person who sprang into action.
The 36-year-old carpenter had just finished lunch and was on his way home when he passed the school, his brother told NBC News. He saw the suspect open fire on a vehicle outside the school then shoot through a window and go inside.
Police said he had a legally concealed .40 caliber in his vehicle and his brother said he grabbed the pistol “and decided to go in after” the suspect. Police say he fired at the suspect “multiple times”, killing him.
In a statement to the BBC’s partner CBS News, Giamanco’s family said he is a “lifelong resident of Bend” and that he “is not seeking recognition”.
The family said Giamanco wants to express his “gratitude to the first responders, school personnel, and community for the outpouring of love and support”. He and his family “respectfully ask for privacy”.
US President Donald Trump praised the bystander’s actions on Friday, calling him a “great hero”.
Addressing reporters at the White House before departing for Georgia, Trump said the situation could have been “much worse” with no intervention.
“It’s a terrible thing, but thank goodness for a man that had a gun and knew how to use it,” he said.
Without naming the bystander, Governor Kotek acknowledged the man’s heroic actions stopping further loss of life, but noted they “carry a heavy emotional burden, and I just want you to know that my thoughts are with you as well”.
Kayla Epstein contributed to this report.