Jury instructions in the context of "Consciousness of guilt"

In common law, a petit jury (or trial jury; pronounced /ˈpɛtət/ or /pəˈtiːt/, depending on the jurisdiction) hears the evidence in a trial as presented by both the plaintiff (petitioner) and the defendant (respondent). After hearing the evidence and often jury instructions from the judge, the group retires for deliberation, to consider a verdict. The majority required for a verdict varies. In some cases it must be unanimous, while in other jurisdictions it may be a majority or supermajority. A jury that is unable to come to a verdict is referred to as a hung jury. The size of the jury varies; in criminal cases involving serious felonies there are usually 12 jurors, although Scotland uses 15. A number of countries that are not in the English common law tradition have quasi-juries on which lay judges or jurors and professional judges deliberate together regarding criminal cases. However, the common law trial jury is the most common type of jury system.

In civil cases many trials require fewer than twelve jurors. Juries are almost never used in civil cases outside the United States and Canada. Other states with a common law tradition sometimes use them in defamation cases, in cases involving a governmental eminent domain power, and in cases involving alleged wrongful conviction. Civil law countries generally do not use civil juries. Civil juries are available in the United States and Canada in almost all cases where the only remedy sought is money damages.

In law, a reasonable person or reasonable man is a hypothetical person whose character and care conduct, under any common set of facts, is decided through reasoning of good practice or policy. It is a legal fiction crafted by the courts and communicated through case law and jury instructions. In some practices, for circumstances arising from an uncommon set of facts, this person represents a composite of a relevant community's judgment as to how a typical member of that community should behave in situations that might pose a threat of harm (through action or inaction) to the public.

The reasonable person is used as a tool to standardize, teach law students, or explain the law to a jury. The reasonable person belongs to a family of hypothetical figures in law including: the "right-thinking member of society", the "officious bystander", the "reasonable parent", the "reasonable landlord", the "fair-minded and informed observer", the "person having ordinary skill in the art" in patent law. Ancient predecessors of the reasonable person include the bonus pater familias (the good family father) of ancient Rome, the bonus vir (the good man) and spoudaios (the earnest person) in ancient Greece as well as the geru maa (the silent person) in ancient Egypt.