(MINNEAPOLIS) — A motive in the Annunciation Catholic School mass shooting remains under investigation, and police said they’ve not identified a specific trigger for why the children at this church were targeted.

Police did confirm that Robin Westman, the 23-year-old suspect, had attended the school, and Westman’s mother previously worked in the parish.

Investigators determined that Westman “harbored a whole lot of hate towards a wide variety of people and groups of people,” and also “had a deranged obsession with previous mass shooters,” Minneapolis Police Chief Brian O’Hara told ABC News Live on Thursday.

“This person, you know, committed this act with the intention of causing as much terror, as much trauma, as much carnage as possible for their own personal notoriety,” O’Hara said.

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