Rule 2:610 Bias or Prejudice of a Witness

If someone testifies in court, the other side can try to show that the witness has a reason to take sides. For example, the witness might be a close friend of one party, have a financial interest in the outcome, or hold a grudge against someone involved in the case.

To prove this bias, the other side can bring in outside evidence beyond just asking the witness about it. This means they can call other witnesses or show documents that support the claim that the witness is not being neutral. The goal is to help the jury or judge decide how much weight to give that person's testimony.