This reminds me of a comment years ago by a Canyon staff member to the effect that at any given moment there were always at least two or three corpses awaiting discovery somewhere in Grand Canyon. She herself had stumbled across the body of a guy who had hung himself along the South Rim.

Grand Canyon National Park (AZ)
Airplane Wreckage Found Near Emerald Canyon

Members of a private boating trip reported the wreckage of an airplane to park rangers at Diamond Creek on May 20th. The boaters informed the rangers that they found the plane with human remains inside during a hike near Emerald Canyon.

Inclement weather prevented rangers from responding to the scene via helicopter until this past Sunday. They first recovered the remains, which await identification from the Coconino County medical examiner, then packaged the plane in a sling load and recovered it using a long line.

The wreckage matches the description of an airplane that disappeared in 2011. That plane, a red RV6 homebuilt experimental aircraft, was last seen at Grand Canyon Airport around 8:30 a.m. on Friday, March 11, 2011. The NPS used both an airplane and a helicopter in search efforts at that time, covering 2,000 air miles over a 600-square-mile search area. Civil Air Patrol’s Nevada Wing, Coconino County Sheriff’s Office and the Air Force Rescue Coordination Center assisted in that search. Search activities continued on a limited basis after April 1, 2011.

The National Transportation Safety Board is investigating the accident.

Probably this Red RV6 which has been missing since March 2011. Article at link has specific ID which is probably what the ME's office is attempting to confirm.

This sounds like one of the older 121.5 MHz ELT's, not one of the newer 406 models that has location info.