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.
If your witness doesn't have a bad background try to develop their background on direct examination. Judges and jurors are more likely to believe a witness if they get to know them. Certain professionals also tend to carry more credibility such as teachers, doctors, nurses, etc.
