(Radio Iowa) – The Appanoose County Sheriff’s Office has identified the fisherman who died at Rathbun Lake on Friday. The sheriff’s office announced an autopsy has confirmed 79-year-old Ralph Jay Rosenberger of Indianola died of accidental drowning. Witnesses say they saw Rosenberger was fishing from a boat in Lake Rathbun on Friday afternoon and then they noticed he was floating in the water. Boaters in the area quickly reached the man and started C-P-R until emergency crews arrived.