In 2005, a 10-day examination of the skeleton, led by forensic anthropologist Douglas Owsley, revealed that Kennewick Man had arthritis in his right elbow, both of his knees, and several vertebrae but not severe enough to be crippling. Owsley discovered that Kennewick Man had also suffered some trauma in his lifetime, which was evident by a fractured rib that had healed, a depression fracture on his forehead, and a similar indentation on the left side of the head, and a spear jab that healed. Despite earlier theories regarding his age, the Owsley team thinks he may have been as young as 38 at the time of death.