I was watching one of these real life CSI shows and they were breaking out the Luminol to check for trace amounts of blood. Now I thought to myself, are there any cleaning chemicals that will clean up blood so well that even luminol won’t even pickup?
No, I don’t have blood to clean up, no I’m not a criminal looking for quick answers. But I’ve always wondered, “hell, if bleach won’t work, nothing will” or will it?
Bleach will work. However, depending on what you put it on it will wreck it making any spots just about as obvious as blood.
The problem with Luminol is that it makes visible traces that often would escape a normal visual check. Including little dots often far from where the body had been.
Which means that unless you’re prepared to clean every surface in the room where the deed was done, it’s going to be hard to eliminate all the trace evidence. Luminol traces often get found behind things like the trim at the foot of the walls. Or other inaccessible surfaces that are hard to clean without leaving other evidence that there’s been a thorough cleaning.
Not according to this.
Protein stains are the worst, because they will denature and bind with the substrate. Mineral, such as iron, is also difficult or impossible to remove.
Must post pet peeve: Movies never get the clottedness of blood right. Blood that sits around on the floor for a few minutes will form clots like big sheets of instant pudding. I know this is true. I’ve done surgery on cows.
If nothing else, I demand that my fantasy gore be realistic.
Apparently, you would be better off slinging your shit around the room since that will also cause luminol to fluoresce.
Actually what you are observing is the decomposition of hydrogen peroxide so anything that decomposes hydrogen peroxide will cause a signal. I just got that from wiki. You could probably also get a result by bubbling oxygen through the solution.
WAG on masking it? Maleic imide or any resilient dienophile. The initial reaction with oxygen is pretty much a Diels Alder with triplet Oxygen.
So if the cops come investigating and you happen to have, say, a Bukkake Room, are you screwed? If all that’s left are traces for Luminol to pick up, how do they determine what was from blood and what was from other proteins?
As a surgeon, I must point out that hemostatsis is an important aspect of any invasive procedure. 
Dilution would stand a good chance of confounding forensic analysis, wouldn’t it?
Say by pouring pig’s blood (available from abbatoirs by the litre for black pudding production) all over the floor.
Might take some explaining, although a black pudding production mishap might be a plausible excuse for having a bloodsoaked kitchen.
Hemostasis is for cats, Vetbridge 
Possibly, but there are tests to differentiate animal blood from human blood.
If your goal is to escape punishment, though, then forcing half a dozen forensic technicians to ELISA test every scrap of your kitchen is not a good idea. They’ll murder you in your sleep and get away with it.
Yeah, but how do you separate out 100ml or less of human blood from 5 litres of pig blood, and do it in a way that is acceptable in court.
If I have a pool of human blood on the floor, clean it up with a cloth, burn the cloth and then douse the room and all the surfaces in pig’s blood, are there still going to be recoverable traces of human blood that will be admissable as evidence?
Wait…so was the question answered? haha lol
I dunno. I do know that the human side of laboratory diagnostics has made amazing strides since the wide-spread use of RT-PCR, so I wouldn’t be surprised if a tech was able to pull trace amounts of human blood from all the pig carnage. I would be surprised at the meticulousness of the tech, however.
If you’re trying to cover up a crime, though, you’re still presumably better off having to explain bleach spots rather than blood spots.
Does the Luminol react everywhere the bleach touched? or just everywhere the bleach touched where there was actually blood?
In other words, if you get blood on, say, 10% of a tile but you clean the whole tile, will 10% glow or will all of it glow? The reference is vague on that.
And smaller quantities dry devilishly fast!
Speaking from experience: at a Girl Scout event, one girl was clowning around and managed to bash into a steel pillar in a school cafeteria, splitting open her lip. While other parents dealt with her, I got damp towels and began trying to mop up the floor. Total elapsed time from split to mopup? less than 10 minutes. But I had to scrub the spots.
Which by the way were very hard to find: the floor was linoleum tiles, with a spatter-y pattern already, and those blood splotches blended right on in!
Re the OP: Sounds like the blood is going to far to hard to get rid of adequately. I’d suggest arson as a better choice - for sure, the penalties for arson are less than for straight-up murder (unless of course you’re careless with disposing of the body, in which case arson+murder is probably worse than plain old murder).
Um, this advice is for the book you’re writing, right?
There was a CSI episode where they found a small container about right for a body and Luminoled the inside of it looking for blood, and it started glowing like mad, and the techs were excited until one of them pointed out that the glow was far too uniform and extensive to be blood patterns, and it must have been a result of somebody cleaning out the inside of the container with bleach.
Assuming that was at all accurate, it sounds like all of your hypothetical tile would glow. Of course, that’s a huge assumption.
Google it. Bleach is ineffective against luminol. What DOES a better cleanup are the new oxygen based cleaners as well as hydrogen peroxide. Peroxide on clothing should be applied before trying anything else. Repeated applications will make the stain disappear.
Since this Zombie is revived, I might as well comment. The best thing with which to clean a crime scene of blood evidence is Luminol. Kill your victim on a hard, non porous surface if possible. After cleaning the area with bleach, apply Luminol to the entire surface and walls. Subsequent applications of Luminol will be ineffective.
I’ve done surgery on goats, and I’ve seen pools of human blood from bullets and blast injuries. While I would not be inclined to disagree with the general statement about movie effects, I think it’s worth noting that the blood of prey animals such as goats and cows has a much, much, greater clotting property than human blood. Human blood pooling on the ground will form sheets of pudding like you say, but it will not coagulate anywhere near as fast or thick as a cow’s. Their platelet count is much higher.