Collier County major crimes detectives are investigating the death of 43-year-old Deena McNelis.
NAPLES, FL — Family and friends of Deena McNelis are seeking answers after the 43-year-old woman was found dead inside her North Naples home, where Collier County deputies opened a suspicious death investigation this month.
McNelis was found at a home on Mangrove Avenue in the Windward Isles community after deputies responded for a welfare check. The case has drawn concern from neighbors and grief from people close to her as major crimes detectives work to determine how she died and whether anyone else was involved.
Deputies responded to 6822 Mangrove Ave. around 11:20 a.m. May 16 after concerns grew that McNelis had not been seen for several days. Neighbors said they had noticed signs that something was wrong, including packages left outside, garbage cans that had not moved and no sign of McNelis walking her dogs. One neighbor, Tom Mayewski, said he came home from golf and saw a large law enforcement response in the neighborhood. “There were a lot of police cars in the neighborhood,” Mayewski said.
A Collier County Sheriff’s Office report said a man who knew McNelis told deputies he had been trying to reach her. His calls went to voicemail, and he was worried about her dogs, according to the report cited in local coverage. Deputies had gone to the home on May 14 and May 15 but were not able to make contact or get inside. When Gulf Coast News later visited the home, evidence tape remained across the front door and both garage doors, and a package was still sitting outside.
The sheriff’s office has not released a cause of death. Officials have not announced an arrest, named a suspect or said whether the death has been ruled a homicide. Court records reviewed by local reporters show McNelis filed for a dating violence protection order in 2025 against an on-and-off boyfriend. In that filing, she described the relationship as tumultuous. Neighbors also told local reporters that deputies had been called to the home before the death investigation began.
The case has left people in the Windward Isles community uneasy because many basic facts remain unknown. Investigators have not said when McNelis died, how long she may have been inside the home before deputies entered or what evidence led them to treat the case as suspicious. The report also said McNelis had recently been released from a hospital after a fall at Blue Martini. Authorities have not said whether that earlier injury is connected to the death investigation.
Family members and friends are now pressing for more information as detectives continue the case. Their public message has focused on McNelis’ life, the shock of her death and the need for answers about what happened inside the Mangrove Avenue home. Local coverage described loved ones as grieving and calling for the truth while investigators continue to review records, witness statements and evidence collected from the house.
Mayewski said neighbors were sorry for McNelis’ family and were waiting to learn more from authorities. “We’re all wondering what happened,” he said. His comments captured the mood in the quiet North Naples community, where residents saw police vehicles and evidence tape but have received few public details about the investigation. The sheriff’s office has said major crimes detectives remain assigned to the case.
No charges had been announced as of May 31. The next major step is expected to come from the Collier County Sheriff’s Office or the medical examiner as investigators determine the cause and manner of McNelis’ death.
Author note: Last updated May 31, 2026.