Independent eyewitnesses providing consistent accounts dramatically improve success chances by corroborating your version of events. Multiple witnesses overcome credibility contests between parties with obvious biases in their own favor. Witness availability for depositions and trial affects case strength, as written statements carry less weight than live testimony. Expert witnesses explaining technical aspects like accident reconstruction or medical causation help juries understand complex evidence. Character witnesses humanize plaintiffs and demonstrate life impacts beyond medical records and economic calculations. Impeaching opposing witnesses through inconsistencies or bias significantly weakens defense positions. Early witness interviews preserve memories before they fade or stories change through repeated telling. Professional witnesses like police officers or EMTs provide credible observations juries tend to trust over lay witnesses.