Indiana Conservation Officers are investigating the death of a Columbus woman that occurred at Patoka Reservoir on Sunday afternoon.
Sheila Huffman, a nurse from Boonville, says she was enjoying the holiday weekend when she heard a desperate call for help.
Indiana DNR officers say 55-year-old Patti Hoskins-Owens, of Columbus, was swimming on a raft when she started yelling for help to get back on the boat.
Once on the boat, she became unresponsive. Huffman, as well as two other nurses then started taking turns giving her CPR.
"We were rotating and assisting each other. When one tired, we went in and took over. One maintained the airway, one maintained the chest compressions, the other was checking for a pulse," Huffman said.
The woman was flown to the hospital, but didn't survive.
DNR officials are waiting on toxicology results, but they think the woman died of a heart condition.