Well he didn't witness a "school shooting", and Walz never claimed he did. What Walz said was that Gus witnessed a shooting at a Rec center. It was widely known locally in MN, but there was no reason it would have made national headlines at the time...
"Gus Walz was at volleyball practice at the Jimmy Lee Recreation Center in St. Paul the afternoon of Jan. 18, 2023, when a 16-year-old was shot and seriously wounded outside.
It wasn’t the first time Tim Walz had spoken about his son’s brush with gun violence, and the shooting itself was widely publicized locally. But the Democrat’s
remarks Tuesday night at his debate with Republican
JD Vance, as the public is still getting to know both vice presidential candidates, offered the biggest stage yet to personalize an issue that has deeply affected many American families.
On Wednesday, the youth’s volleyball coach, David Albornoz, praised Gus in an interview with The Associated Press for how he helped get other kids to safety and keep them calm amid the chaotic scene."
When the issue of gun violence came up at the vice presidential debate, Minnesota Gov. Tim Walz had a personal story to tell: His teenage son, Gus, had been at a sports center last year when a shooting took place.
apnews.com
Just because Trump and Vance make up stories to sensationalize issues, doesn't mean everyone else does...