What term refers to the British common law requiring witnesses to assist in capturing criminals?

The term that refers to the British common law requiring witnesses to assist in capturing criminals is "Hue and Cry." This was a legal obligation in medieval England that mandated all able-bodied citizens to pursue and help apprehend a suspect if a crime was committed and the alarm was raised. It reflects the community's role in law enforcement, where individuals were expected to act collectively to maintain public order and safety. This system relied on the participation of the community rather than a formal police force, highlighting the importance of collective responsibility in addressing crime in early legal systems.

The other terms, while related to law or civic duties, do not accurately describe this specific legal concept. For example, "Common Plea" relates to a type of legal action that pertains to private matters. "Law of the Land" often refers to the principles or laws that govern a region as a whole, which is broader and does not specifically address witness obligations. "Civil Duty" refers generally to responsibilities of citizens to engage in community service or participate in civic life, which is distinct from the specific historical obligation of aiding in the capture of criminals as outlined by the Hue and Cry.