If the remains were cremated, I'm thinking that's an even stronger reason to be cautious.
Which, of course, allows me to sound off about one of my pet bugbears - the cremation of murder victims. [Mods - feel free to send this post elsewhere]
...It should be a world-wide proviso that, as far as possible, the bodies of murder victims should be cremated until such time the perpetrator is convicted, in case future technology might aid the capture of the person responsible.
I hate to think of the amount of evidence that has gone up in smoke...in particular the case of Cheri Jo Bates, where she was not only cremated, contrary to most Roman Catholic practice in that era (Rome had only broken with tradition three years previously, and then on the strict proviso that the ashes were treated as if they were a body, not kept in a kitchen cupboard or the like).
Joseph Bates scattered his daughter's ashes to the four winds. I have never understood this. His infant daughter was buried in a tiny cemetery in the deepest midwest. If he was worried about Cheri's grave becoming a weird pilgrimage site, why not bury her there? I can guarantee there wouldn't be too many "pilgrims", especially in winter...