Authorities say Minneapolis school shooter was obsessed with the idea of killing children [SOUND]

# Acting US Attorney General for Minnesota, Joseph Thompson, says the attacker who opened fire during the Annunciation Catholic School Mass in Minneapolis on Wednesday was obsessed with the idea of killing children. Robin Westman opened fire on praying students through the windows of the Annunciation Church, killing two children aged eight and ten. Eighteen other people were wounded. Westman killed himself on the scene. Thompson says Westman left a note. but did not seem to have any specific motive: