What is the ruling on praying over a deceased person and burying them after the discovery of a body swap? And will the deceased be questioned in the grave before the actual burial?

The funeral prayer for the deceased must be repeated due to the absence of the condition that the deceased be present before the worshippers, and perhaps because the deceased was not shrouded and washed before the prayer. As for questioning the deceased in the grave, the general rule is that it occurs after burial, but there is no evidence regarding the time of questioning if the burial is delayed.