This is pretty bizarre by most standards, but what gets me is the missing throat part, which also leads me to believe foul play was at hand, and he was choked to death. The Missing Brain and heart is probably normal procedure during autopsy but the missing throat is suspect and would have probably been the smoking gun had it not been done by someone who was part of the cover-up. The medical examiner who initially did the toxicology report came out and stated this:
"The York County Coroner initially said Palmer “became agitated and began hitting his head against his cell door” before determining the cause of death to be from “complications following an excited state, associated with methamphetamine toxicity, during physical restraint.”
A lot of things do not add up in this case and I would start with the medical examiner as his findings seems on the take to falsify a report!