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KS SB398
Bill
Status
2/19/2026
Primary Sponsor
Judiciary
Click for details
AI Summary
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Amends K.S.A. 60-456 to require proponents of expert testimony to demonstrate by a "more likely than not" standard that the expert's specialized knowledge will help the trier of fact understand the evidence or determine a fact in issue
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Expert witness testimony must be based on sufficient facts or data, be the product of reliable principles and methods, and reflect a reliable application of those methods to the case facts
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Lay witness opinion testimony must be rationally based on perception, helpful to understanding testimony or determining facts, and not based on scientific, technical, or specialized knowledge
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Repeals the existing K.S.A. 60-456 and takes effect upon publication in the statute book
Legislative Description
Requiring a proponent to demonstrate that it is more likely than not that certain specialized knowledge will help the trier of fact to understand evidence before certain qualified witnesses may testify.
Last Action
House Committee Report recommending bill be passed as amended by Committee on Judiciary
3/12/2026