Robin Westman once attended the Annunciation Catholic School and had been a member of the neighbouring church, police said.
Authorities were poring over videos, writings and movements of the attacker but remained uncertain what motivated 23-year-old Westman to open fire through stained glass windows as children celebrated Mass on the first week of classes at the Annunciation Catholic School.
“Everything we’ve seen so far is a classic pathway to an active shooter,” Minneapolis police chief Brian O’Hara said on NBC’s Today show on Thursday, adding police have seen nothing “specific to trigger the amount of hate that occurred yesterday”.
“It is very clear that this shooter had the intention to terrorise those innocent children,” Mr O’Hara said.
Investigators have recovered hundreds of pie