Are they looking for or trying to differentiate the DNA?
Granted, we do not know at this time. The first responders did not treat the accident site with kid gloves. In the pictures that I have of the accident site, you cannot see center post attached the ship. Most likely walked on and left soaking in the marsh for two days. Then after the second responders left, the cabin and cockpit are areas are completely decimated. They even repositioned the tail section.