The idea of this sounds great!
I don’t know if this is a stupid & ridiculous idea from me, i apologise if this sounds extremely absurd (and i understand why) but a while back i watched the documentary on the St. Louis Jane Doe, and the authorities on her case had lost track of her burial, so they teamed up with a local university (?) & used Jane Doe’s burial photos to build a map of the cemetery to locate her grave, and they were successful.
I don’t think BCJD had photos taken of his burial, but maybe if old pictures of the cemetery itself are available, or maybe even photos of other burials, authorities could use those photos for a map to locate BCJD’s place of burial especially if there was movement of his remains?