New video footage shows the suspect in last week's mass shooting at a Minneapolis Catholic school buying a firearm at a gun shop just days before the attack.

Disturbing gun shop security footage shows demonic Annunciation Church shooter Robin Westman grinning and chatting with employees and customers mere days before his savage rampage in Minneapolis that left two children dead and more than a dozen injured.

Surveillance footage from a gun store shows Minnesota church shooter Robin Westman appearing “normal” and interacting positively with staff while shopping for guns days before a Catholic school tragedy,

Robin Westman -- the school shooter who killed two kids at a Minneapolis Catholic school last week -- went to a gun store days before the shooting ... and, handled multiple weapons in security video from the place.