Most definitely murder, there's no other way you can spin it.
it's already possible to have duplicates of each other. It's called "identical twins". We're born from a single cell at birth, but we split apart, therefore having mostly identical genes. We may react identical and have similar brain chemistry, but we're still distinct individuals. It's the most similar we can get to each other and we still firmly think that we our ourselves rather than our twin sister, even though we look and think alike. I know that identical twins don't look and think 100% alike, but looking into a mirror is far different than looking at a clone of yourself.
How do I know this? Um...bet most of you forum goers know already.