David Cooper vanished on October 12, 2022, while hiking Mount Moosilauke via the Dartmouth Outing Club Trail in New Hampshire's White Mountains. Despite massive air and ground operations led by the New Hampshire Fish and Game Department and local police, no trace of the 28-year-old experienced hiker or his blue pack has ever been recovered. The case quickly evolved from a standard wilderness search into an open-ended investigation involving digital forensics, witness leads, and unanswered questions about what happened on the mountain.
When Cooper didn't return by 6:00 PM as promised, his sister Maya filed a missing persons report with the Woodstock Police Department. Initial rescue efforts focused heavily on the 1.5-mile lower stretch of the trail. However, investigators soon recovered his phone left behind near the trailhead, active until his ascent began, which shattered early assumptions about a simple navigational misstep on the trail.
The Timeline and Immediate Response
Understanding how the search unfolded requires looking closely at the initial hours following Cooper's disappearance. He texted his sister around 8:30 AM before starting his solo trek. By late evening, when he missed his check-in, search coordinators had to act fast.
- 8:30 AM: Cooper sends a final text message confirming his ascent up the Dartmouth Outing Club Trail.
- 6:00 PM: Scheduled return time passes without word or check-in from Cooper.
- 10:30 PM: A formal missing persons report is filed with local authorities, sparking an immediate night-time response.
- October 13–15: Over 50 search and rescue personnel, K-9 units, and thermal-imaging drones comb the lower and middle ridges of Mount Moosilauke.
Rescuers faced immediate hurdles because Cooper's physical fitness and familiarity with the terrain meant he could cover ground quickly if he strayed. Yet, tracker dogs failed to pick up a consistent scent past the first mile marker, leaving teams baffled as to whether he ever reached the upper elevation zones. You can review broader protocols utilized during such operations through the New Hampshire Fish and Game search archives.
Unresolved Questions and Evidentiary Gaps
The investigation left several glaring gaps that continue to trouble cold case researchers and local authorities alike. Unlike typical backcountry accidents where gear or footprints are spotted along steep ledges, this case yielded almost no physical evidence beyond the vehicle and phone left at the parking area.
Where is the Digital Trail?
Cooper's smartphone was found at the trailhead, meaning he hiked without a mobile device or any active GPS tracking app on his person. Investigators questioned why an experienced trekker would leave a primary navigation tool behind, unless it was intentional or placed there during a hurried encounter before stepping onto the dirt path.
The Missing Person of Interest
State police later disclosed they were examining unverified reports of a dark sedan parked near the trailhead for an extended period on the afternoon he went missing. Security camera footage from neighboring businesses in Woodstock and Lincoln was pulled, but public appeals failed to identify the occupants of the vehicle conclusively.
Weather and Terrain Conditions
The weather on October 12 was unseasonably mild during the day, dropping sharply near dusk. While hypothermia is a constant threat in the White Mountains, search teams swept the obvious ravines, blowdowns, and shelter areas where a disoriented hiker might seek refuge. No torn clothing, boot prints, or personal belongings turned up in any of the expected hazard zones.
Evolving Theories in the Cooper Investigation
Because physical clues are virtually non-existent, law enforcement split their focus across three distinct hypotheses, weighing the likelihood of each as time went on.
- Voluntary Departure: Some early speculation touched on whether Cooper walked away from his life voluntarily. Friends and family strongly rejected this, pointing to his stable job, upcoming plans, and lack of personal distress.
- Foul Play: The presence of an unidentified vehicle and the sudden nature of his disappearance led investigators to look closely at third-party involvement, treating the trailhead as a potential contact point rather than just a starting line for a hike.
- Wildlife Encounters or Misadventure: While black bears inhabit the region, scavengers rarely remove a hiker and all associated gear without leaving signs of a struggle or scattered belongings. Still, dense timber and subterranean rock fissures on Moosilauke make accidental falls into hidden crevices a persistent risk in the area, as documented by the Appalachian Mountain Club.
Frequently Asked Questions
Did David Cooper leave a note?
No. Investigators found no physical or digital note indicating any intent to harm himself or disappear. His communications with family and coworkers leading up to the hike were entirely normal.
Was search and rescue called immediately?
Yes. Once his sister realized he had missed his return window by several hours, a report was filed before midnight, allowing search teams to deploy at first light the following morning.
Has the case officially been closed?
No. The Woodstock Police Department and New Hampshire State Police maintain an active file on the disappearance, periodically reviewing tips and digital records as new analysis tools become available.
Is Mount Moosilauke considered a dangerous hike?
While popular and well-maintained, the mountain features steep ascents, rapid weather shifts, and dense forest canopy that can disorient hikers who step off established paths.
