Not to make you fret about it, but she was meant to have been cremated. Her family was given ashes, which they spread thinking were hers.
At least her head was not cremated, which means some or all of the ashes they received weren't what they thought they were, since some or all of her body was not in what they received. I strongly suspect that she was illegally used as part of the illicit traffic in human remains. Cremated remains are easy pickings for a body trader. You give someone an urn, how are they to know it's not containing what you promised it would be?
At the very least, it's fraud, compounded by mistreatment of human remains, which would be covered by some kind of variant of local law. Here's an example from my part of the world.
CRIMINAL CODE 1899 - SECT 236 Misconduct with regard to corpses
MOO