That chick who killed her partner in their garage with a phillips screw driver used the wrong bleach:

There are two types of bleach found in household cleaning products. Chlorine-based bleaches are known to make bloodstains invisible, but applying chemicals such as luminol or phenolphthalein will still reveal the presence of haemoglobin - crucial for identifying blood - even after up to 10 washes. In contrast, oxygen bleach, which contains an oxidising agent such as hydrogen peroxide, erases all trace of haemoglobin. Its effect seems to have been untested until now.

It seems to me cleanup isn't the biggest problem... it's that 150+ lbs of dead body that needs to be got rid of that seems the main stumbling block.

Well, that and, you know, killing is wrong and stuff.