Modifies provisions relating to the admissibility of expert testimony evidence

Passed Legislature

This bill passed both chambers and reached final enrollment, even if later executive action is not shown here.

Sponsor: Trent, Curtis; House handler: N/A
Last action: 2026-01-27
Official status: Second Read and Referred S General Laws Committee
Effective date: 2026-08-28

Plain English Breakdown

The plain English breakdown is still being put together. The official documents below are already here.

Bill History

2026-01-27 S242
Second Read and Referred S General Laws Committee
2026-01-07 S80
S First Read
2025-12-01 Missouri House of Representatives and Missouri Senate
Prefiled

Official Summary Text

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Introduced

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SB 1309 - This act makes changes to the provision regarding admissibility of expert testimony to mirror the Federal Rules of Evidence. Specifically, expert testimony may not be admitted unless the proponent demonstrates to the court that it is more likely than not that the proffered testimony meets the knowledge, testimony, and reliability requirements. Furthermore, this act modifies the reliability requirement by providing that the expert's opinion reflects a reliable application of, rather than the expert has reliably applied, the principles and methods to the facts of the case.

This provision is identical to SB 238 (2025) and HB 263 (2025).
KATIE O'BRIEN