UJI 13-2003. Jury sole judges of witnesses.

You alone are the judges of the credibility of the witnesses and of the weight to be given to the testimony of each of them. In determining the credit to be given to the testimony of any witness, you may take into account the witness’ ability and opportunity to observe, the witness’ memory, the witness’ manner while testifying, any interest, bias or prejudice that the witness may have and the reasonableness of the testimony, considered in light of all the evidence in the case.