The family of a 10-year-old girl killed by a transgender mass shooter has accused YouTube of failing to flag alarming videos posted by her murderer — including a manifesto warning of the coming atrocity.
Harper Moyski was killed alongside Fletcher Merkel, 8, when Robin Westman, 23, shot up the Catholic church at the Annunciation School in Minneapolis during a welcome mass for students in August 2025, injuring 27 others before turning the gun on himself.
Westman — who was born Robert, a male, before identifying as female with the new name Robin — should have been flagged as a threat after posting videos online glorifying violence, guns and racism, lawyers planning a lawsuit on behalf of Moyski’s family told KARE.
The most alarming clips were posted hours before the mass shooting — including a deranged manifesto with diagrams of the church, attorneys Bakari Sellers and Greg Francis noted of posts previously authenticated by cops.
“The family feels very strongly that more could’ve been done, more should’ve been done, with these videos that were posted, uploaded to YouTube,” Francis said.
“There are safety protocols that should’ve been in place.”
Knowing that YouTube “could have saved her life but chose not to is more than any parent could bear,” the lawyers added of grieving parents Jackie Flavin and Michael Moyski, who called their daughter “pure joy and hope.”
The planned lawsuit will also name Facepunch Studios, the developer of the sandbox video game Garry’s Mod, for allowing Westman to openly discuss violence with other players.
Neither Google, which owns YouTube, nor Facepunch immediately responded to requests for comment.
Westman, 23, opened fire through the stained glass windows of a church at the Annunciation Catholic School — where he formerly attended — during a celebratory back-to-school Mass filled with children.
Minneapolis Police Chief Brian O’Hara previously confirmed that Westman posted the videos — including the manifesto — hours before the massacre.
In one 20-minute video, Westman flips through the disturbing handwritten manifesto, much of which is written in a bizarre homespun code. He gleefully fantasizes about “being that scary horrible monster standing over those powerless kids” and confesses admiration for the 2012 Sandy Hook massacre.
“I am feeling good about Annunciation,” he wrote in one entry.
“It seems like a good combo of easy attack form and devastating tragedy and I want to do more research. I have concerns about finding a large enough group. I want to avoid any parents, but pre and post school drop off,” another page reads.
Near the end of the video, Westman flicks through a number of blank pages before reaching what appears to be a drawing of the church.
In other written entries, Westman expressed antisemitic and racist views.
Westman applied to change his birth name from Robert to Robin when he was 17 years old, claiming he “identifies as a female and wants her name to reflect that identification,” according to court documents.
That name change was granted in January 2020 but five years later, he seemed to have regretted changing his sexual identity.
