A Texas doctor allegedly injected poison into IV bags, causing the death of a fellow physician and cardiac emergencies in 11 other patients, at a Dallas facility in retaliation for a medical misconduct probe, federal court papers allege. Anesthesiologist Raynaldo Rivera Ortiz Jr., 59, was arrested Sept. 15 — one week after the Texas Medical Board yanked his license after a string of healthy patients suffered mysterious and life-threatening complications during routine surgeries from May to August. None of the patients were under his care. "Respondent’s continued practice of medicine poses a continuing threat to public welfare," the board wrote...