Breaking News: The gunman who killed four people at a Tulsa medical building underwent back surgery last month and the doctor who performed it was one of the victims, police said.His weapons included an AR-15-style rifle he bought hours before the attack.

https://twitter.com/nytimes/status/1532410185221799942

So the guy was probably lib at his wits end with pain & told the Doctor. The Doctor probably told him to take 2 Advil & see a Physical Therapist once a week for 6 weeks before he will consider prescribing pain meds. The guy decided he couldn't take it anymore, & decided to not only off himself & take out the Doctor who he blamed, but also try to help the Left with gun control.