(Radio Iowa) – A Mason City man serving a life sentence has died in prison. The Iowa Department of Corrections says 54-year-old Kenneth Ray Sharp died from natural causes Sunday at the Iowa Medical and Classification Center where he had been taken due to chronic illness. Sharp was convicted by a jury of first-degree kidnapping in November of 1995 after he and another man were accused of kidnapping and raping a woman. Sharp went to prison on December 21st, 1995 — and unsuccessfully appealed his sentence in 2008.