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title: "Dennis R. Chassaniol | KnowJudges"
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# Dennis R. Chassaniol

Missouri 10th Judicial Circuit Court · Judge

## Profile

- Court: Missouri 10th Judicial Circuit Court
- State: Missouri
- Role: Judge
- Service status: active
- Last verified: 2026-07-26

## Summary

Official statewide and applicable court procedural guidance applies to this judge.

## Before you appear

- Read the judge-specific standing order first when one is listed.
- Check the docket and case orders for requirements that supersede broader guidance.
- Confirm current remote-access and courtroom technology arrangements before the proceeding.

## Courtroom Rules

### media equipment advance approval

Scope: statewide

Missouri Court Operating Rule 16 requires advance approval for media equipment used for courtroom coverage and allows the judge to control the number and setup of media personnel and equipment.

Evidence excerpt: Failure to obtain advance approval for equipment may preclude its use in the proceeding.

[Missouri Court Operating Rule 16.04, Technical](https://www.courts.mo.gov/page.jsp?id=354)
Source checked: 2026-07-26

### device use in courtroom

Scope: statewide

Missouri courtroom device use for media coverage is not generally permitted unless authorized by the operating rule, a local court rule, or the judge presiding in the proceeding.

Evidence excerpt: No person may use any device capable of media coverage in a courtroom or court clerk's office unless specifically authorized

[Missouri Court Operating Rule 16.04, Technical](https://www.courts.mo.gov/page.jsp?id=354)
Source checked: 2026-07-26

### audio video recording

Scope: statewide

Missouri allows limited video and audio recording for media coverage under COR 16 technical limits, subject to judicial approval and courtroom controls.

Evidence excerpt: Not more than one videographer, using a single device, shall be permitted in the courtroom during a judicial proceeding at any time.

[Missouri Court Operating Rule 16.04, Technical](https://www.courts.mo.gov/page.jsp?id=354)
Source checked: 2026-07-26


## Sources

- [Official profile](https://www.sos.mo.gov/cmsimages/bluebook/2025-2026/5_Judicial.pdf)
- [Official roster](https://www.sos.mo.gov/cmsimages/bluebook/2025-2026/5_Judicial.pdf)
- [Missouri Secretary of State Official Manual official judicial roster](https://www.sos.mo.gov/cmsimages/bluebook/2025-2026/5_Judicial.pdf)
- [Missouri Court Operating Rule 16.04, Technical](https://www.courts.mo.gov/page.jsp?id=354)

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## Biography

### Professional career

- Specialty: Treatment Court Judge, 11th Judicial Circuit
- Associate Circuit Judge in the St. Charles County Circuit Court in Missouri, serving as the Treatment Court Judge for the 11th Judicial Circuit
- Licensed to practice in Missouri and the U.S. Federal Court, Eastern District of Missouri

### Education

### Additional information

- Judicial Service: Former municipal judge in Cottleville, Dardenne Prairie, Lake St. Louis, Moline Acres, O’Fallon, and Winfield Currently serves as Municipal Judge in multiple Missouri communities
- Before becoming a judge, Chassaniol defended clients in DWI, drug offenses, assault, traffic violations, driving while revoked, and illegal firearm use cases, in both state and federal court.



## Published courtroom rules

### Shared court rules

- [Missouri Court Operating Rule 16.04, Technical](https://knowjudges.com/courtroom-rules/national-shared-set-b0a3408119d84bbcc3619511) — Scope is limited to the court class in the source claim.  Shared court context only; case-type restrictions, exceptions, later amendments and case orders apply. This is not a personal preference or a complete rules inventory. [Official source](https://www.courts.mo.gov/page.jsp?id=354). Collected 2026-07-26.