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A week after a crazed 23-year-old shot and killed two children and injured 18 more victims at a Catholic mass in Minneapolis, details about a chaotic personal life and a meticulously planned attack by a maniac who was "obsessed with the idea of killing children" have begun to unravel.

Robin Westman, formerly Robert Westman, committed the heinous act at the Annunciation Catholic Church the morning of Aug. 27 before committing suicide at the scene. As a child, Westman attended both the school and the church, which is located next door.

The years and months leading up to the unthinkable mass shooting appear fraught with chaos in the shooter's personal life.

MINNEAPOLIS POLICE REVEAL MORE ABOUT CHURCH SCHOOL SHOOTER'S MOTIV

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