CALIFORNIA EVIDENCE: CIVIL AND CRIMINAL
...Opinion & Scientific Evidence
......Limitations of Expert Testimony
.........Credibility or Truthfulness
6 Cards On This Topic:

No abuse of discretion in limiting E2's testimony impeaching E1 where E2's admitted testimony achieved precisely what D wanted—it called into question E1's reputation for veracity.

Expert may not testify to ultimate question of whether witness telling truth on specific occasion.

Credibility or truthfulness of witness improper subject of expert testimony.

Expert testimony that prison inmates may lie or give false incriminating testimony properly excluded.

Court may not compel witness to undergo psychiatric exam to determine credibility.

Court properly denied D's request to have psychiatrist evaluate witness to determine competency; dangers of this kind of evidence recited.