A witness’s story begins with who they are.
In novels a lot of time is devoted to character development, because people want to know who the characters are. The same is true in trials.
When a witness does not have a problematic background, you should develop that background on direct examination. Judges and jurors are more likely to believe a witness when they understand who the witness is, where they come from, and how they fit into the story of the case. Certain professions such as teachers, doctors, and nurses also tend to carry added credibility. This information should clearly be presented to the judge or jury.