When workers, consumers, or members of the public die due to the reckless conduct of corporations or corporate executives, one legal option available in many States is to charge the reckless parties with unintended murder. This article reviews the variety of definitions of unintended murder and applies these to examples involving corporate defendants. This analysis highlights a special issue in relation to corporate defendants -- the role of risk assessment efforts in establishing culpability. Definitions of unintended murder, in relation to corporate defendants, must attend to both the mens rea of corporate decisionmakers and the justifiability of risks that result in death. (Author abstract)