Disposing of a body at home: the perfect crime doesn't exist

The perfect crime doesn't exist: chemistry, DNA, and cell phones prevent it

For nearly five years, the same question has been repeated in an online exchange that now exceeds 584 posts and 44,000 visits: how to dispose of a corpse in a city apartment without leaving a trace, evidence, or suspicion. The premise is killing an assailant in self-defense. Almost all proposed solutions crash against the same wall: the one erected by forensic science. And the most uncomfortable paradox is not police-related, it's chemical.

Does caustic soda dissolve a corpse?

The star method in fiction is acid, but those who have researched the matter point to a worse nuance. For caustic soda to attack tissue, sustained heat is required: some calculate twenty hours at 90 degrees, while others raise the stakes to a stainless steel airtight container capable of withstanding 150 degrees without the mixture boiling. The reaction is the same as that of pipe unblockers that require hot water, only on a different scale. None of that fits in a city apartment kitchen, amidst the smell and the risk.

The most repeated objection goes in the opposite direction: in caustic soda environments, bodies tend to saponify, meaning they are better preserved, not disappear. The fat transforms, and the body mummifies, according to this version. Hard remains that resist, like teeth, would also be left. This is the kind of detail no series tells.

Why DNA, cell phones, and cameras ruin the plan

The most compelling argument is not chemical, but electronic. It's emphasized that DNA functions as an identity card and that if remains are found in the most remote mountain, they will be found anywhere. It's enough for a neighbor to see a foot sticking out of a hole for them to call the police. Added to this is what almost no one calculates: mobile phones record location, collection bins have schedules, and high-profile cases—like that of Marta del Castillo, whose body still hasn't been found—demonstrate that investigations can drag on for years.

Those who argue otherwise have a statistic at hand: most murders go unsolved. This may be true in aggregate, and yet, it's useless as a plan. The relevant percentage is for cases where there is a prior link between victim and aggressor: in those, the investigation has much more to go on.

From the freezer to the chest: the logistics no one calculates

The most realistic proposals share a common bottleneck: transportation. Freezing, chopping, and distributing in different neighborhood dumpsters sounds orderly until one remembers having to take the package down the elevator, cross a lobby, and drive at night without arousing suspicion. The freezer appears in almost every version—some joke about buying it and returning it later—and the smell, temperature, and physical effort are the brakes mentioned by those who have chopped real meat. Those who have only skinned a rabbit warn: it's not the same.

What if the assailant breaks in to rob and you kill them?

Here the conversation becomes almost sensible. The most repeated recommendation is not to hide the body, but to call the police and claim self-defense or insurmountable antiestéticar, with a lawyer. The alternative scenario proposed is to admit to negligent homicide with mitigating circumstances and trust in a suspended sentence. The calculation is cold: poorly hiding a body adds a crime; confessing an excess in defense is a legal problem. And a warning from experience: the assailant may have accomplices waiting outside.

With chemistry against you, forensics against you, and logistics against you, the question is no longer whether the perfect crime is possible, but why we continue to dedicate almost five years of conversation to it. Perhaps because fiction makes it seem easy. Or because no one wants to imagine the real scene.