The bill amends K.S.A. 60-456 concerning the rules of evidence related to testimony in the form of opinion. It establishes that a witness who is not an expert can only provide opinions that are rationally based on their perception, helpful for understanding their testimony, and not reliant on specialized knowledge. For expert witnesses, the proponent must demonstrate that it is more likely than not that the expert's specialized knowledge will assist the trier of fact in understanding the evidence or determining a fact in issue. Additionally, the testimony must be based on sufficient facts or data, adhere to reliable principles and methods, and reflect a reliable application of those principles to the case's facts.

The bill also repeals the existing section of K.S.A. 60-456, streamlining the criteria for admitting expert testimony in court. It clarifies that unless a judge excludes the testimony, it is assumed to meet the necessary findings for admission. Furthermore, it states that opinions or inferences that are otherwise admissible are not objectionable simply because they address the ultimate issues to be decided by the trier of fact. This legislative change aims to enhance the clarity and reliability of expert testimony in legal proceedings.

Statutes affected:
As introduced: 60-456
As Amended by House Committee: 60-456
Enrolled: 60-456