oops, insane serial killer doctor

pretend, hopefully, it isn't reality, you are a crazy serial killer and a doctor. this is the debate question: scapel , butcher knife, scapel butcher knife? the scalpel is sharper, easier to conceal, more comfortable because of knowing how to use it and having experience with it, it easy as an alibi if need be because it is a professional tool of the trade, easier to get rid of, not out of the ordinary . a butcher knife is, well, you can take it from here on your own.