Testimonial Evidence. Flashcards
Competency.
Both Federal and California law require witnesses testify based on personal knowledge, have the ability to communicate, take an oath or make an affirmation to tell the truth, and claim to recall what they perceived.
California: witness also must understand legal duty to tell the truth.
Grounds for disqualifying witnesses. Federal and California:
All witnesses are competent except for judge and jurors. California also disqualifies witnesses who were hypnotized before trial to help refresh recollection except, in a criminal case, witness hypnotized by police using procedures that protect against suggestion.
Expert opinion. Federal and California: 5 requirements for admissibility. Opinion must be:
- helpful to jury,
- witness must be qualified,
- witness must believe in opinion to reasonable degree of certainty,
- opinion must be supported by a proper factual
basis, and - opinion must be based on reliable principles reliably applied to the facts.
Federal and California law differs on application of the last requirement to scientific opinions.
Federal Daubert/Kumho Standard
Reliability of scientific opinions determined by four
factors: publication/peer review, error rate, results are tested and there is ability to retest, and reasonable level of acceptance. As to non-scientific opinions, reliability determined ad hoc looking at facts and circumstances of the case.
California Kelley/Frye General Acceptance Standard
Reliability of scientific opinions determined by one factor: the opinion must be based on principles generally accepted by experts in the field.
This standard is not altered by Propostion 8 because it is a standard of relevance. (Remember, Proposition 8 only makes evidence admissible if it is relevant.)
Kelley/Frye inapplicable to non-scientific opinions and medical opinions, reliability of which is based on facts and circumstances of the case.
Murder prosecution. Defendant is Professor Gold. Prosecution expert offers to testify that a new DNA testing technique reveals perpetrator must be a bald law professor.
While the validity of the technique is not generally accepted among scientists in the field of genetics, it has been peer reviewed and published in scientific journals, has been tested and is subject to retesting, has a low error rate, and has a reasonable level of acceptance. Admissible?
Federal: Yes
CA: No, not generally accepted
Learned treatise hearsay exception.
Federal: Admissible to prove anything if treatise is accepted authority in field. California: Only admissible to show matters of general notoriety or interest, meaning this exception is very narrow and almost never applicable.
Impeachment by Prior Inconsistent Statement of witness now testifying at trial. Federal and California:
Not hearsay if offered only to impeach. Federal: If given
under oath at trial or deposition, also not hearsay to prove truth of facts asserted, otherwise hearsay and inadmissible to prove those facts.
California: Hearsay if offered to prove truth of facts asserted but admissible under exception, which extends to all inconsistent statements of witness, whether or not under oath.
Action for personal injuries in auto accident. Plaintiff’s witness testifies defendant ran the red light. On cross, defendant asks “Didn’t you tell the police that defendant had the green light?” The witness answers “Yes.” What is this relevant to prove? What is it admissible to prove?
1) Relevant to impeach the witness by showing a prior inconsistent
2) Relevant to show the D had the green light
Federal: Admissible for impeachment, but inadmissible to show D had green light
CA: Admissible for all purposes
Impeachment with Prior Felony Conviction. Federal:
All felonies involving false statement (e.g. perjury, forgery, fraud) are admissible…no balancing of unfair prejudice against probative value except for old convictions (see p. 51). Convictions for felonies not involving false statement may be admissible but court must balance.
Impeachment with Prior Felony Conviction: CA:
All felonies involving “moral turpitude” are admissible but court must balance; felonies not involving moral turpitude are inadmissible in California. Prop. 8 does not make such felonies admissible because convictions must involve a crime of moral turpitude to be relevant for impeachment.
Moral turpitude =
crimes of lying, violence, theft, extreme recklessness, or sexual misconduct, but not crimes for merely negligent or unintentional acts.
Prosecution for tax fraud. Defendant testifies and admits his tax return did not report all his income, but claims this was unintentional. Prosecution offers evidence Defendant previously was convicted of felony perjury in an unrelated
case. Admissible in federal and state court to impeach Defendant as a witness? Does court have discretion to balance probative value against unfair prejudice?
Federal: Admissible to impeach and no discretion to balance
CA: Possibly Admissible to impeach - 1)Perjury involves moral turpitude; 2)Balancing of unfair prejudice versus probative value
Prosecution offers evidence that Defendant was previously convicted of felony child molestation in an unrelated case. Admissible in federal and state
court to impeach Defendant as a witness? Does court have discretion to balance probative value against unfair prejudice?
Federal: Possibly Admissible
CA: Possibly Admissible - Involves moral turpitude of sexual misconduct, but probative value might not outweigh prejudicial value
Prosecution offers evidence Defendant was previously convicted of felony involuntary manslaughter in an unrelated case. Admissible in federal and state court to impeach Defendant as a witness? What is the effect of Prop. 8 in California?
Federal: Possibly Admissible - Can impeach with felonies that don’t involve false statement, but got to balance unfair prejudice v probative value
CA: Inadmissible: 1) No moral turpitude - involuntary manslaughter involves an unintentional or negligent crime