Nobody used my all time favorite method: cannabalism. Sure, cops check all sorts of things, but do they ever check your poop for bone fragments? Might hurt a bit, and be a little fattening, but blending/food processing a corpse is the way to go!

I have given some tought to this before, and I always arrive at the same conclusion: cook it and throw a huge party.

If it is the right kind of party, when the police come they will find a complete mess of DNA samples, and your friends will forever thank you for the free food and booze.