The shooter who killed two children and injured 18 worshippers attending Mass at a Minneapolis Catholic school was quiet and seemed to resent school as an eighth grader there seven years ago, a former classmate said.

Officials identified the shooter as Robin Westman, 23, and said Thursday that Westman was a former student at Annunciation Catholic School. The ex-classmate recalled Westman once hid in the bathroom to avoid going to the all-school Mass. YouTube videos allegedly posted by the shooter suggest Westman experienced depression and expressed admiration for at least a dozen other acts of mass violence, but didn't spell out any specific ideology.

Armed with a rifle, shotgun and pistol, Westman approached the side of the church at Annunciation Catholic School and fired more tha

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