I think most occupations has risks. I'm an electrician and everyday that I work I accept the risk that I may be hurt or killed by electrocution, falling, or a traffic accident. I know the risk and I accept them. Most occupations has risks that the person will be hurt or killed. Being a thief is the same. If you choose to break into my house you have accepted the risk that I will shoot you.
It's not murder. It's an occupational risk.