The burden of proof in a personal injury or wrongful death claim is a preponderance of the evidence. This means “more likely to be true than not true,” or true with at least a 51 percent certainty. A Houston bus accident attorney will use multiple types of evidence to help prove your case. For instance, witness statements may be collected or physical evidence from the scene will be reviewed or sent to experts for further examination. Other types of evidence can include a police accident report, your medical records, photographs and video footage, and expert testimony. The goal is to either convince a jury that you deserve compensation or to add leverage to obtain a quick settlement.