EVIDENCE Flashcards
EVIDENCE
an assertion of fact, opinion, belief, or knowledge whether material or not and whether admissible or not.
Evidence rules
principles developed and refined over hundreds of years, that are designed to ensure that only relevant and probative evidence is admitted in court proceedings, and that irrelevant, unreliable and prejudicial evidence is excluded, so that cases can be fairly and expeditiously decided
Testimony
refers to the oral statements made by witnesses under oath
A lay (or fact) witness
a non-expert witness who must testify from personal knowledge about a matter at issue (testimony)
Expert witness
a person who, by reason of education, training, skill, or experience, is qualified to render an opinion or otherwise testify in areas relevant to resolution of a legal dispute (testimony)
Real evidence
describes physical objects that played a part in the issues being litigated.
Demonstrative evidence
a tangible item that illustrates some material proposition (e.g., a map, a chart, a summary). It differs from real evidence in that demonstrative evidence was not part of the underlying event; it was created specifically for the trial.
Direct evidence
includes testimony that tends to prove or disprove a fact in issue directly, such as eyewitness testimony or a confession
Circumstantial evidence
evidence that tends to prove or disprove facts in issue indirectly, by inference.
Relevant evidence
evidence that tends to prove or disprove a fact in issue
Character evidence (propensity evidence)
testimony or exhibits that purport to establish a “trait of character” or propensity to behave in a particular way, such as carefulness, honesty, violence, or cowardice
Exhibits
tangible objects presented as evidence
The “Best Evidence” Rule
This prohibits a party from testifying about the contents of a document without producing the document itself.
Chain of Custody
refers to (1) who has had possession of an object, and (2) what they have done with it.
Hearsay
“a statement, other than one made … at the trial or hearing, offered in evidence to prove the truth of the matter asserted.”
In criminal cases, there are some instances where character evidence is relevant to the charge at hand
Character evidence may be admitted in criminal trials if
• character is an element of proving the act.
• The accused may offer evidence of his or her good character, in which case the prosecution may introduce evidence of the accused’s bad character
• Character evidence may be admissible to reflect on the credibility of a witness
• To show the accused’s knowledge, intent, or motive for the crime
• To prove the existence of a larger plan of which the charged crime is a part
• To show the accused’s preparation to commit the charged crime
• To show the accused’s ability and means of committing the crime (possession of a
weapon, tool, or skill used in the commission of the act)
• To show that the accused’s opportunity to commit the crime
• Threats or expressions of ill will by the accused
• Physical evidence at the scene linked to the accused
• The suspect’s conduct and comments during arrest
• Attempts to conceal identity
• Attempts to destroy evidence
• Valid confessions
Opinion Testimony
Generally, lay (i.e., non-expert) witnesses are only allowed to testify about what they have
actually experienced firsthand, and their factual observations. Witnesses provide a report on
what they know, and keep their opinions and conclusions to themselves.
Exceptions to the Opinion Rule NON-EXPERT WITNESSES Opinions are admissible if they pass a three-part test:
- Does the witness have direct personal knowledge of the facts to which the opinion pertains?
- Is the opinion of the common, everyday sort, i.e., does not involve specialized knowledge or tests?
- Is the opinion NOT part of a legal judgment, reserved for the jury or judge to decide?
Exceptions to the Opinion Rule EXPERT WITNESSES
Expert witnesses are allowed to give opinion testimony because they possess education,
training, skill, or experience in drawing conclusions from certain types of data or information
that lay witnesses do not possess. However, expert testimony may be excluded if it embraces
a legal conclusion. Therefore, expert opinions addressing guilt or innocence will likely be
excluded in criminal cases.
Demonstrative Exhibits
An exhibit used for purely “illustrative purposes” Such evidence is admissible if the court decides that it presents a fair and balanced summary or picture of the evidence and is not unduly
prejudicial.