According to source,

YOSEMITE NATIONAL PARK, Calif. (FOX26 News) —

UPDATE: Wednesday, October 18, 2017: Yosemite National Park Rangers have positively identified the remains of Alexander Joseph Sevier. Sevier was last seen in Yosemite Valley on May 3, 2017. Sevier, a member of the U.S. Navy, was staying in a housekeeping camp. People witnessed Sevier hiking each day during his visit. When Sevier was reported missing, Park Rangers, along with search dogs and a CHP helicopter, launched an extensive search to look for him. At the end of August, human remains were found near the banks of the Merced River below Vernal Fall. The remains were sent out for DNA testing and were confirmed to be the remains of Sevier.

ORIGINAL: May 8, 2017: Yosemite National Park officials are now asking for help finding a 24-year-old man. Park officials say Alexander Joseph Sevier was last seen in Housekeeping Camp on or around May 3rd. Sevier is an active member of the U.S Navy, serving at the Navy Medical Center in Portsmouth, Virginia. He is described as being 5' 6" tall, 128 lbs. with black hair and brown eyes. They say he could be wearing Aeropostale, Abercrombie, or Hollister brand clothing. Park officials say Sevier would take day hikes and return to the camp at night. Rangers are looking for him on popular trails such as Upper Yosemite Fall Trail and Mist Trail, with dogs and a helicopter to help. Around 30 people are involved in the search.

If you were in the area of Yosemite Valley on May 1 through May 5 and have any information regarding this individual, please contact Yosemite National Park Dispatch at 209-379-1992.