This from a commercial UAV group I know. They are assisting with identification and recovery efforts. The "P2V+" is a DJI Phantom 2 Vision Plus. They gave permission to share on this forum. 
An absolutely surreal day. We were greeted at HQ at 7:30a and upon our arrival, the coroner incident command) called us to get onsite right away. Escorted in a convoy to the crash site, we were surrounded by Sheriff, DNR, NTSB, Red Cross, and others.
Upon our arrival, we met with a number of authorities and informed them of our capabilities. They were tremendously interested in the orthomosaic mapping and led us to an area of interest: an old rice paddy in 6 feet of water.
We set our mission over the rice field using just a P2V+ and flew the autonomous mission in 5 minutes. All photos were stitched in the cloud and close examination revealed many pieces of wreckage under water (we were able to see to the bottom). We handed the images to the North Charleston PD dive team and moved to a second and then third location to map.
Upon our completion of the third location (our 7th mission) we packed up and started walking the woods to help map the debris field under the forest canopy with the NTSB team. We then returned to the rice paddy and learned that our map was already being used by the dive team to recover the sections we discovered from above.
There are of course other occurrences and items we found that I wish I had not witnessed but we half expected it. The day was very surreal and I felt I wad on the verge of crying throughout. One of my partners, 
Tom Lucey and I are hot, dehydrated, and deeply humbled by the loss of life that occurred yesterday. But at least we feel gratitude for the time we donated to the recovery efforts in our home county. Jets some photos that I feel I can share.