Four people were killed in a shooting inside of St. Francis Hospital The gunman, Michael Louis, 45, took his own life after killing four people, according to police. Michael Louis targeted Dr. Preston Phillips, a board-certified orthopedic surgeon specializing in spinal surgery who performed back surgery on Louis last month. Louis repeatedly called the doctor’s office and complained of pain following the back surgery before going on a shooting rampage.“He blamed Dr. Phillips for the pain following the surgery,” Tulsa Police Chief Wendell Franklin told reporters