What is the purpose of using a friend's testimony in a trespassing case involving a fisherman?

In a trespassing case involving a fisherman, using a friend's testimony primarily serves the purpose of impeaching the fisherman's credibility. Impeachment in this context refers to presenting evidence that challenges the reliability or truthfulness of a witness's statements. If the friend's testimony contradicts what the fisherman has claimed—such as the circumstances of the fishing incident, the fisherman's permission to be on the property, or his past behavior regarding trespassing—it can significantly undermine the fisherman's version of events. This strategic use of a friend's testimony can lead the court to doubt the fisherman's reliability, making it less likely that the court will accept his claims. This approach can be particularly effective in establishing that the fisherman may not be trustworthy or may be misrepresenting the facts of the situation.