CALIFORNIA EVIDENCE: CIVIL AND CRIMINAL
...Opinion & Scientific Evidence
......Limitations of Expert Testimony
.........Guilt or Innocence
3 Cards On This Topic:

Opinions on guilt or innocence are inadmissible because they are of no assistance to the trier of fact, who is as competent as the witness to weigh the evidence and draw a conclusion on the issue of guilt.

Failure to object to Es' inadmissible testimony concerning D's guilt constituted ineffective assistance of counsel.

Witness may not express opinions on definition of crimes, whether a crime committed or on defendant's guilt, as jury is as competent as expert to weigh evidence and draw conclusion of guilt or innocence.