As I might be said to understand it, generally one does not want to stash a body in a Bag of Holding, or at least not a Bag of Holding you have anything else in, except I suppose other bodies but maybe even not then. It's an anaerobic environment; it's very, very dark. Give it even a day and untying the bag's opening comes with a faint outgassing hiss. Give it a week and it's Highly Specialised Tongs time as one tries to fetch the remnant solids out of the ghastly slurry.