In the winter of 1982, a 19-year-old man named David Thies vanished from his Manhattan, New York apartment building, leaving behind a loving family and a case that would remain cold for decades. On the afternoon of December 13th, a day that should have been a celebration of his father's birthday, David stepped out into the hallway of his family's apartment to smoke a cigarette and was never seen or heard from again. Earlier that day, he had gone out to purchase a gift for his father and had plans to help with the birthday dinner that evening. At the time of his disappearance, David was described as a Caucasian male with dark brown hair and blue/gray eyes. He stood at 5'11' and weighed approximately 140 pounds. He had a mustache and beard, a pierced left ear, and a scar on the right side of his nose. The clothes he was last seen wearing were a brown jacket, a blue shirt, white pants, green-striped socks, and white sneakers.
The circumstances leading up to David's disappearance added layers of complexity and concern to the investigation. In the weeks prior to his vanishing, his mother, Karen DiGia, noticed a change in his behavior. She recalled that he seemed depressed and would obsessively flip through television news channels, appearing as though something he saw had threatened him. Psychiatric social workers familiar with his situation noted that David had suicidal tendencies, a concern that weighed heavily on his family and investigators. In a desperate attempt to find answers, his parents offered a $25,000 reward for any information that could lead to his whereabouts. This plea for help generated more than 40 tips, with various individuals reporting that they had seen someone matching David's description in California. These alleged sightings placed him in situations ranging from selling items on the street to associating with a cult group. Despite these leads, none of them could be substantiated, and David was never located.
Decades have passed since David Thies was last seen, and his case remains an unsolved mystery. The initial investigation, handled by the New York City Police Department's Missing Persons Squad, has been unable to uncover any definitive evidence explaining his disappearance. While the possibility that he may have taken his own life was considered due to his reported depression, no evidence was ever found to support this theory. The lack of concrete information has been a persistent challenge in this case, leaving his family with unanswered questions and a profound sense of loss. The investigation has remained open over the years, a quiet testament to a young man who seemingly vanished without a trace from a busy Manhattan building on a cold December day. The overview of the case reflects a heartbreaking story of a family's enduring hope and the frustrating reality of a cold case with few clues to follow.Last Seen: Dec 13, 1982
