Robin Westman -- who killed 2 kids and injured 17 people in a targeted shooting at a Catholic church in Minneapolis Wednesday -- reportedly wrote a long-winded manifesto and uploaded a number of strange videos prior to the attack.

According to CNN ... investigators are currently examining -- and trying to authenticate -- YouTube videos allegedly posted by the shooter in order to gain more insight into a possible motive for the violence. Play video content

8/27/25

The videos in question -- and the account itself -- have since been taken down, but Minneapolis Police Chief Brian O’Hara told reporters Westman had a "manifesto" scheduled to be published on YouTube Wednesday ... when authorities say Westman shot into morning Mass at Annunciation Catholic Church with a rifle, a sh

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