Symptoms were extremely high fever and brain swelling. Nearly 60 other concertgoers were hospitalized.Hospital staff said the deaths could have been caused by a drug overdose. Doctors believe some came in with symptoms associated with taking MDMA (known as “Molly”). Florida Poison Control said officials are trying to match the symptoms of those who were hospitalized with possible drug sources. An investigation is underway. Drug-sniffing dogs were hired by the organizers of the music festival to screen people at the door. Police reported 25 felony arrests, eight misdemeanor arrests and 16 marijuana civil citations at the festival. The festival has a black history. There are drug victims every year. “The health, safety and welfare of our fans and community is Sunset Music Festival’s first priority and we take every measure to create a safe environment at our events,” the organizers said.