Efren Saldivar (born September 30, 1969) is an American serial killer who murdered patients while working as a respiratory therapist. Born in Brownsville, Texas, he graduated from the College of Medical and Dental Careers in North Hollywood, California in 1988. He obtained work as a respiratory therapist employed by the Glendale Adventist Medical Center, working the night shift when there were fewer staff on duty. He killed his patients by injecting a paralytic drug which led to respiratory and/or cardiac arrest. These drugs could have included Morphine and Suxamethonium chloride as they were found in his locker with fresh and used syringes. Pancuronium (brand name Pavulon) definitely was used in six murders; this drug is used to stop a patient's respiration when they are about to be put on a medical ventilator. He was careful in the selection of his victims, choosing those who were unconscious and close to death.
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