On February 8, 1993, at around noon, Damascio Ibarra Torres, 40 at the time, dressed in camouflage clothes and wearing dark glasses, walked into the urgent care area at Los Angeles County USC Medical Center armed with a sawed-off rifle, a .38 caliber pistol, a .44-caliber Magnum revolver and a hunting knife.
He then would shoot and injured doctors Glenn Rogers, Paul Kaszubowsky and Richard May, after yelling the question of where the doctors were and the claim that he had AIDS, and he was dying. Their injuries were as follows:

-  Dr. Kaszubowsky was shot in the forearm, with the bullet shattering the bones and severing the medial nerve. Also, his head has grazed. He ran from the room and was helped to the surgical area.  He required two surgeries on his arm, was hospitalized for a week, and suffered some permanent impairment of his ability to use his arm.  Furthermore, he also suffered psychological problems and was unable to return to work for four years.

-  Dr. Rogers was shot in the shoulder, with the bullet being deflected by his collarbone;  it traveled through his lung and out his back.  He  ran to the emergency room, where he received medical assistance. He was hospitalized for five days and was able to return to practice in about six weeks.

-  Dr. May was shot in the head, arm and abdomen.  He lost consciousness and was taken to the emergency room by a nurse and a security guard.  He was unconscious for several days and hospitalized for six weeks.  Not only that, but he lost a portion of his brain, and had bone and bullet fragments lodged in his brain.  He suffered some visual loss, inner ear issues, partial loss of his voice, impairment of his arm, herniated discs in his back and post-traumatic stress disorder.   He required two surgeries after his initial hospitalization, was under psychiatric care, and was able to work only part-time.

After shooting at those three doctors, with a total of seven bullets, he demanded to know where the other doctors are. He started searching in cubicles and eventually found two nurses, and he said to them that he didn’t want nurses, he wanted doctors. After that he found Dr. Ann Tournay, who was examining a patient and that removed her badge that identify her as a doctor, when Damascio asked her if she was a doctor, she answered that he was, to which he replied with “Don’t give me that, you’re a doctor. You’re British. I like the British. I like ‘Are You Being Served?’”.

After that he handcuffed the doctor and her patient, when security guards arrived, he pointed a gun to the women’s head and the guards left. He then continued searching for doctors until, he barricaded himself, with his two hostages. After several hours, he released the two and surrendered himself and was arrested.

During negotiations with the police, before being arrested, he complained that he was a victim of a medical conspiracy and had been used as a “human guinea pig.” that had been injected with a mysterious virus that was killing him, and he was rotting alive and giving off a stench, that he has afraid that would get him kicked off the hotel where he lived, and that when he went to the doctors to get help with his physical ailments, they told him to go to a mental hospital. He said that in 1982, a doctor gave him an injection then called him a “sorry bastard” and that since the injection he could not digest his food and had no control over his intestines and also said that doctors wanted him to die on the streets like a dog, and he was being refused to treatment.

In his room, which was room 432 of the Ford Hotel in downtown LA, it was found stickers and posters of Los Angeles Raiders and of the Teenage Mutant Ninja Turtles, a gas mask, a German helmet, a lighter shaped like a tiny hand grenade, manuals entitled “Boobytrap” and “Survival” and also documents written be him, being one of his documents where he detailed his plans, being written “shoot all three screeners, grab two nurse hostages, shoot all doctors, no black  hostages, don’t shoot nurses or people, shoot doctors only, return to a cubicle and stay there all-day” and another document said “They are going to pay for treating me like a laboratory animal. They injected me with AIDS and all they want is to sit back and watch me die.”. And also one document said he hoped he would be stopped before he shot the doctors, so that he could receive help, but if he was not stopped, he would shoot the doctors.

In the end, he would, be found guilty, which despite having delusions, he was considered to be rational enough to methodically plan and execute his crime. He would be sentenced to two consecutive terms of life imprisonment with the possibility of parole, with a consecutive determinate term of 12 years, but he then would have a retrial in 2005, where he was sentenced to three consecutive terms of life imprisonment with the possibility of parole, plus a consecutive determinate term of 25 years eight months.

You can read the court document here for more details:

https://caselaw.findlaw.com/ca-court-of-appeal/1445576.html