A woman whose left leg was amputated after developing an infection from a heel ulcer has settled her medical-malpractice lawsuit for $3 million.In 2014, plaintiffs Helen Stotler and her husband, Billy, sued Cook County and the doctors at Stroger Hospital who initially diagnosed her diabetic heel ulcer in June 2013, alleging they were negligent and failed to take steps to reduce the weight on the ulcer and to appropriately assess the vascular supply to her left foot.When the condition worsened, Helen Stotler got a second …