A chilling manifesto was allegedly posted online hours before the shooting - as were images of guns with words scribbled on the magazines. Picture: Youtube By Jacob Paul The killer who gunned down two children at a Minneapolis school on Wednesday had a twisted obsession with another mass shooter and long planned to carry out a major attack, a chilling manifesto has allegedly revealed. Listen to this article Loading audio... Robin Westman, 23, stormed Annunciation Catholic Church at around 8:30am local time as children attended their first mass of the school year. Westman, formerly known as Robert, fired through stained...