Advanced DNA Analysis Identifies Two Unidentified Men in Florida Cold Cases
Forensic DNA sequencing and genetic genealogy have helped identify two men whose remains remained unidentified for decades in Hillsborough County, Florida, according to a report published on 14 October 2026.
The first case dates to 2 October 1982, when fishermen discovered a man's body in a lake near Tampa. The death was determined to be drowning, but the man had no identification. Investigators later documented several healed fractures and surgical hardware. Despite years of investigation, his identity remained unknown.
In 2024, investigators submitted evidence to forensic laboratory Othram. Scientists used advanced genome sequencing to develop a single-nucleotide polymorphism (SNP) profile. The profile was then used for forensic genetic genealogy, which generated investigative leads that helped authorities identify the man as Robert William Hart.
The second case involved a man found in the Alafia River in Riverview on 14 February 2008. Despite the recovery of his body and continued investigative efforts, authorities could not establish his identity. The medical examiner's office later submitted evidence for advanced DNA analysis.
Researchers generated an SNP profile and used genetic genealogy to identify potential relatives. Follow-up investigation confirmed the man's identity as George Hayward Coy Jr., born in 1962.
The identifications demonstrate how modern DNA methods can assist investigations when conventional identification approaches have failed. SNP profiling can provide genetic information suitable for genealogical comparison, while investigators verify leads through additional evidence and follow-up enquiries.
Genetic genealogy does not independently establish identity: it generates leads that require investigative confirmation. The method's effectiveness also depends on DNA quality, available reference information and the existence of useful genetic relatives in searchable databases.
The two cases were reported as the 69th and 70th publicly announced Florida identifications involving Othram's technology.