The POI in this case was a neighbor who continued to be a menace to society, as detailed in this lengthy article from November 2003:

The 1990 murder of the Deep Creek woman, Sharon Gill, remains unsolved. Investigators at the time had said Shawn Malsky bragged about the murder to several friends. After Malsky spent 27 months in jail, however, prosecutors dropped the charges because they were unable to place him at the scene of the killing.
Still officially a cold case:

On March 21, 1990, in the afternoon hours, CCSO deputies were called to the residence of Sharon Marie Gill on Rampart Blvd in the Deep Creek section of Punta Gorda, Florida after a family member came home and discovered that she was dead inside her house.

Investigation revealed that Sharon Gill had been stabbed multiple times. She was home alone at the time of this incident and no signs of forced entry into her residence were discovered.
MSM from 1992:,2661417&hl=en