Shoot me down if you feel like I'm wrong, but outside the CoMC Au, i feel like sea burial could be a viable way to dispose of corpses on Tartarus? It's already located on a really isolated island, why waste the time and effort to dispose of an unwanted corpse in a grave somewhere else? Especially if they're of dangerous criminals. The only people who would want the body to be buried properly would be potential family members (and who gives a fuck about their wants on Tartarus) or their followers. Sea burial would be convenient and it would keep followers from stealing a body and/or making a shrine out of the gravesite. I thought about the potential of Tartarus staff using cremation as well, especially since that seems to be the standard in Japan, but again it would require a ton of energy and time to cremate a body, it's not an instantaneous event. Just weigh the body down, stuff it in a shroud and bury it at sea. Again, just my thoughts, but I've had this in my head for a while and considering how it coincides with my love of TCoMC, I had to word vomit. Ty for your time.
that is a fair analysis. my main issue is that there is almost certainly a morgue where they do extremely detailed autopsies on dead prisoners. theres no way someone hasnt faked death in an attempt to escape before. sea buriul is very much a realistic method of getting rid of corpses, its the step before that that im concerned about