The body will lose a degree or two of internal temperature per hour after death. Rigor Mortis (stiffening of the body) sets in within a few hours (as early as a couple of hours after death, as long as six). If the body was not yet stiff, you can be fairly certain your friend's father died within a few hours of your arrival. But if he was already cool to the touch, it is certainly possible that he died earlier than the nursing home claims.
Any medical questions should be asked on the medical side of Avvo, not the legal side.
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