which is the first step in establishing liability
Negligence The legal liability of a defendant to a plaintiff is based on the defendant's failure to fulfil a responsibility, recognised by law, of which the plaintiff is the intended beneficiary. The first step in determining the existence of a legally recognised responsibility is the concept of an obligation or duty. In the tort of negligence the term used is duty of care [7]
Actus reus Actus reus (/ˈæktəs ˈreɪəs/), sometimes called the external element or the objective element of a crime, is the Latin term for the "guilty act" which, when proved beyond a reasonable doubt in combination with the mens rea, "guilty mind", produces criminal liability in the common law-based criminal law jurisdictions of England and Wales, Canada, Australia, India, Pakistan, South Africa, New Zealand, Scotland, Nigeria, Ghana, Ireland, Israel and the United States of America. In the United States of America, some crimes also require proof of an attendant circumstance.