Nearly 50 years after his body was discovered frozen in a cave along the Appalachian Trail, officials have identified the 'Pinnacle Man' as 27-year-old Nicolas Paul Grubb from Fort Washington, Pennsylvania. Grubb, who served in the Pennsylvania National Guard until 1971, was found dead on January 16, 1977, with an autopsy concluding his death resulted from an overdose of Phenobarbital and Pentobarbital, ruled as a suicide. His body was exhumed in 2019 and entered into the National Missing and Unidentified Persons System, but identification remained elusive until a state trooper located Grubb's original fingerprint card, leading to a positive match. Grubb's family expressed gratitude for the closure and plan to reinter his remains in their family plot. This case underscores both the challenges of cold case investigations and the advances in forensic science that can eventually bring resolution. The Berks County Coroner's Office highlighted the collaborative efforts of local, state, and federal agencies in solving this decades-old mystery.