Fyi, the "2 am" was a typo in some earlier reports. Pyne Gregory found the remains during daylight hours.
Just in my mind (IMO), I have never thought that Pyne Gregory was implicated in Tom’s disappearance. He likes outdoors and hunting and therefor it would not be unusual for him to search for shed antlers while hiking. January 9 is typically a bit early to hunt for shed antlers; the most common timeframe for whitetail deer to drop antlers is late January and February …. maybe some as late as early March. Nonetheless, it is possible that sometimes deer shed antlers a bit earlier, sometimes a bit later.
Maybe Gregory had some information from a tip. Maybe he had some suspicion based on something he had seen or overheard and he was protecting his source by claiming that he was “screwing off looking for deer sheds”. Or, maybe he was simply looking for shed antlers when he discovered the remains, as he stated.