"The scene was one too horrible and sickening for language to describe. Human
skeletons, disjointed bones, ghastly skulls and the hair of women were scattered
in frightful profusion over a distance of two miles." (1859 report)
You might want to check out this account of the massacre, cover up, and trial of John D. Lee by a University of Missouri KC Law School Professor.
Lee was a liar and gave ever-changing accounts of the slaughter for the rest of his life. He even claimed that he was the peacemaker during the whole process and that he tried to stop it, when in fact he was one of the instigators. His word cannot be taken for scrap because he gave so many discordant accounts.
However, two of the most recent “authoritative” books on the massacre corroborate that the bodies were placed in shallow graves after being gathered and looted. They gather this information from journals (several different primary sources), etc. of those who buried the dead—many of whom did not participate in the murders.
Again, I’m not apologizing for the event. I’m just trying to stick to the facts as gathered by truth-seeking researchers. Hell, Bagley’s book is certainly not pro-Mormon. One account as given by Lee can be refuted by another that he said he helped bury the bodies, and his testimony hardly stands as the bastion of truth whilst trying to cover his tracks.