Missouri 2026 Regular Session Status: In Committee

SB 1309 — Modifies provisions relating to the admissibility of expert testimony evidence

Last action — Second Read and Referred S General Laws Committee

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  1. ✓
    Introduced
  2. 2
    In Committee
  3. 3
    Passed Senate
  4. 4
    Passed House
  5. 5
    To Executive
  6. 6
    Enacted

This bill is in committee in the Senate. Introduced December 01, 2025. It must pass committee before a floor vote.

Next likely step: a committee vote, then a floor vote in the Senate.

Prognosis

Stalled 14% · moderate confidence

Where this bill stands today.

Odds of enactment

Low

How often bills like it became law.

  • In Committee

    Current position in the legislative process.

  • 1 sponsor

    1 primary, 0 co-sponsors signed on.

Prognosis reads this bill's own signals — stage, sponsorship breadth, committee status, recorded votes and cross-state momentum. Odds come from a model trained on which bills have become law.

Summary

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 act is identical to SB 918 (2026), HB 2255 (2026), SB 238 (2025), HB 263 (2025), and a provision in SB 313 (2025). KATIE O'BRIEN

Bill Text

Action History

  1. Second Read and Referred S General Laws Committee

  2. S First Read

  3. Prefiled

Sponsors

Sponsorship breakdown

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1 sponsors · 0 co-sponsors · 198 not signed on

Sponsors (1)

Co-sponsors (0)

None.

Not signed on (198)

198 members have not signed on to this bill.

Show all 198 →

"Not signed on" means a member has not sponsored or co-sponsored this bill — it does not imply opposition. Members flagged Voted No have a recorded No vote on this bill.

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Subjects

public-safety civil-rights
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Frequently asked questions

What does SB 1309 do?
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 act is identical to SB 918 (2026), HB 2255 (2026), SB 238 (2025), HB 263 (2025), and a provision in SB 313 (2025). KATIE O'BRIEN
Who sponsors SB 1309?
SB 1309 is sponsored by Curtis Trent.
What is the current status of SB 1309?
This bill is in committee in the Senate. Introduced December 01, 2025. It must pass committee before a floor vote.
Where can I track SB 1309?
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Last checked for changes 2 months ago · updated continuously

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