The Monroe County Sheriffs department is investigating the death Saturday of a woman in Henrietta at Marketplace Mall. Sheriffs investigators tell News 8 Now 51 year-old Susan Banker of Lima was petting a horse used by the Sheriffs mounted patrol unit outside of the Marketplace Mall just before 3 p.m. when she slipped under the horse. Banker was taken to Strong Hospital where she later died. The Monroe County Sheriffs department says it is not sure if the horse stepped on Banker when she slipped or if she hit her head when she fell. An autopsy is underway to determine exactly how she died, those fndings are expected tommorrow.