Define direct evidence.Define circumstantial evidence. What is the difference? Define relevant evidence and explain why evidence must be relevant. Is relevant evidence always admitted?

Direct evidence is any evidence that, if believed, establishes the truth of the fact in question.
Circumstantial evidence is indirect evidence offered to establish, by inference, the likelihood of a fact that is in question. Circumstantial evidence differs from direct evidence in that it does not directly establish the fact in question but only the degree of likelihood of the fact's existence. Relevant evidence is evidence that tends to prove or disprove a fact in question. Evidence must be relevant in order to be admitted in court; however, relevant evidence will not always be admitted. This is true when the probative value of the evidence is outweighed by other considerations, such as evidence that is unnecessary, distracting to the jury, misleading to the jury, or likely to cause an emotional decision by the jury.