AdvertisementTulsa gunman bought an AR-15 the day of the mass shooting and targeted his doctorUpdated June 02, 2022Rina TorchinskyfacebookEmailTwo people hug outside at Memorial High School where people were evacuated from the scene of a shooting at the Natalie Medical Building on Wednesday, in Tulsa, Okla. (AP)This article was originally published on June 02, 2022.