Question

scientists also found thinking he may have been carrying a wounded friend. medical bandages someone elses blood a cell phone showed a 911 call stretched clothing

Explanation:

If a person was carrying a wounded friend, having someone else's blood (indicating they were in contact with a wounded individual) would be a relevant finding. Medical bandages could be for self - use. A cell phone with a 911 call is more about seeking help rather than directly related to carrying a wounded friend. Stretched clothing could have various causes not necessarily tied to carrying a wounded person.

Answer:

someone else's blood