Looking for Book!verse

[shes_a_geek]

Ages ago, I read a really funny casefic on ff.net (I think) that followed Moriarty and Moran's side of a murder and the resulting investigation. I don't remember much, other than Moriarty killing a man with a weighted yo-yo and a description of the well-attended yet less-than-mournful funeral (the only person who would generally miss the deceased was an elderly relative who still mistakenly thought him a good person). I think I also remember Moriarty making sarcastic comments about the applied sciences being less interesting than pure mathematics.

EDIT: Found! It's Mary le Bow's A Way with Words or Whatever