What evidence is there that Jesus died on the cross? Inspired by How long was Jesus in the tomb?, the question could be reasonably raised "if Jesus was only in the tomb for a day and a half, can we be sure that he really died, or were the witnesses mistaken?"

I'm looking not simply for biblical assertions by the biblical authors that Jesus died on the cross, but more objective facts about what happened. For example, if he got cold and blue, or if rigor mortis set in, or if the tomb began to smell, this type of data would be supporting evidence of his death.
According to this article in the Journal of the American Medical Association, Jesus died from hypovolemic shock and exhaustion asphyxia. The shock, caused by his scourging, was made apparent by his inability to carry the cross member. When the spear pierced Jesus' side, both blood and water were said to come out of the wound. The latter is explained by pleural and pericardian effusions. Furthermore, Jesus cried out in a loud voice, which suggests that there was a "catastrophic terminal event" such as a cardiac rupture.