Judge Mark Boessenecker: Professional Background and Legal Expertise

Napa County Superior Court, Department E

CA Bar #: 124319 (December 1986)

Appointed By: Gov. Arnold A. Schwarzenegger

Biography

Overview

The Hon. Mark Boessenecker (Ret.) was a judge for the Napa County Superior Court in California[1]. Boessenecker was appointed to the bench by former Governor Arnold Schwarzenegger in 2007, filling the vacancy created by the retirement of Ronald Young[1]. He retired on February 26, 2026[1].

While on the bench, Boessenecker's assignments included an initial assignment in family law[2]. He also served multiple terms as supervising judge of the criminal division, assistant presiding judge, and presiding judge, leadership roles he held for eight years in total as the court responded to earthquakes, wildfires, and the COVID-19 pandemic[1]. In statewide judicial education work, Boessenecker served as faculty for criminal law programs for judges and trained other judges in evidence-based sentencing[1].

Educational background

Boessenecker earned a B.A. in economics from the University of California, Santa Barbara, in 1981. At the University of California College of the Law, San Francisco (formerly University of California, Hastings College of the Law), he completed a J.D. in 1986[2]. While attending the University of California, Santa Barbara, he taught at a group home for youth[2]. He was admitted to the State Bar of California (December 1986).

Career history

After graduating from law school, Boessenecker began his legal career as a deputy district attorney with the San Mateo County District Attorney's Office in 1986[2]. During his seventeen years there, he served in the Sexual Assault Crime Unit and the Homicide Unit, and he later supervised the Homicide Unit[2]. In 2004, he moved to Napa to join the Napa County District Attorney's Office as chief deputy district attorney, where he continued to prosecute homicide cases[2]. He sought the Napa position because the smaller office allowed him to continue trying cases while also serving as an administrator[2]. That work continued until his appointment to the bench.

In 2007, the California District Attorneys Association recognized Boessenecker as its Outstanding Prosecutor of the Year[3].

Personal life

Raised in Mill Valley, California, Boessenecker graduated from Marin Catholic High School in 1977[2]. His father, brother, and sister are all attorneys.

Boessenecker is registered as a Democrat[4].

References

[1] Napa Superior Court Press Release (February 23, 2026)
[2] Daily Journal — Judicial Profile: Mark Boessenecker
[3] California District Attorneys Association — Award Recipients
[4] Ballotpedia — Mark Boessenecker

Recent Cases by Hon. Mark Boessenecker

LAN NGUYEN vs NAPA SUPERIOR COURT

On January 30, 2025 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

3 Files

Filed

Jan 30, 2025

Status

Dismissal

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

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Case Last Refreshed

Mar 13, 2025

Estate of Judith Warren Flinn

On June 9, 2023 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Jun 09, 2023

Status

Consolidation

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

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Practice Area

Probate

Matter Type

Estate Administration

Case Last Refreshed

Oct 30, 2023

NAPA COUNTY et al vs Lindsay Blair Hoopes et al

On October 20, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

538 Files

Filed

Oct 20, 2022

Status

Relief Denied

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

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Case Last Refreshed

Oct 21, 2026

The People of the State of California vs. Kolczak, Andrew James

On April 29, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Apr 29, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

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Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 10, 2025

The People of the State of California vs. Montanez, Luis Antonio

On April 22, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Apr 22, 2022

Status

Active

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Napa County

County

Napa County, CA

Case #

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Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

May 11, 2022

The People of the State of California vs. Dickens, Robert Allen

On April 22, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Apr 22, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

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Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 10, 2025

The People of the State of California vs. Acuna, Juan Carlos

On April 18, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Apr 18, 2022

Status

Active

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Napa County

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

May 04, 2022

The People of the State of California vs. Cerasoli, Dominic Paul

On April 15, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Apr 15, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 09, 2025

The People of the State of California vs. Kirgiorgis, Paul Apostolos

On April 8, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Apr 08, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 09, 2025

The People of the State of California vs. Rivera, Valentine Botello

On March 30, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Mar 30, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 09, 2025

The People of the State of California vs. Rivera, Valentine

On March 30, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Mar 30, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 09, 2025

The People of the State of California vs. Adams, James Brett

On March 15, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Mar 15, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 09, 2025

The People of the State of California vs. Cazares, James Andrew

On March 4, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Mar 04, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 10, 2025

The People of the State of California vs. Medina, Migel Angel

On March 2, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Mar 02, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 09, 2025

The People of the State of California vs. Medina, Migel Angel

On February 28, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Feb 28, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 10, 2025

The People of the State of California vs. Ramirez, Angel Castillo

On February 23, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Feb 23, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 09, 2025

The People of the State of California vs. Octaviano, Francisco Javier Magadaleno

On January 31, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Jan 31, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 09, 2025

The People of the State of California vs. Flaherty, Daniel Joseph

On January 21, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Jan 21, 2022

Status

Transfer

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 10, 2023

The People of the State of California vs. Carrillo, Francisco Junior

On January 12, 2022 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Jan 12, 2022

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Jun 09, 2025

The People of the State of California vs. Fuentes, Alejandro Ivan

On December 21, 2021 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Dec 21, 2021

Status

Closed

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Napa County

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

Mar 18, 2022

The People of the State of California vs Chavez, Rodolfo Antonio

On December 14, 2021 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Dec 14, 2021

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Napa County

County

Napa County, CA

Case #

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Case Last Refreshed

May 03, 2022

The People of the State of California vs Seymour, Ronnie

On December 9, 2021 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Dec 09, 2021

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Napa County

County

Napa County, CA

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Case Last Refreshed

Apr 29, 2022

The People of the State of California vs Spencer, Dean Russell

On November 15, 2021 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Nov 15, 2021

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Napa County

County

Napa County, CA

Case #

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Case Last Refreshed

Mar 18, 2022

The People of the State of California vs. Rasmussen, Lars Bjorn

On November 5, 2021 a case was filed in the jurisdiction of Napa County. Judge Mark Boessenecker presiding.

Filed

Nov 05, 2021

Status

Active

Judge

Hon. Mark Boessenecker 👉 Discover key insights by exploring more analytics for Mark Boessenecker

Court

Superior

County

Napa County, CA

Case #

(Subscribe to View)

Practice Area

Criminal

Matter Type

General Criminal

Case Last Refreshed

May 23, 2025

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About

Mark Boessenecker
Current Appointment Napa County Superior Court, Department E	Napa County Superior Court, Department E
Education J.D., University of California, Hastings College of the Law - 1986 B.A., University of California, Santa Barbara - 1981	J.D., University of California, Hastings College of the Law - 1986 B.A., University of California, Santa Barbara - 1981

Documents related to Mark Boessenecker

Court Info

Court Info
Current Court:	CA - Napa County Superior Court
Clerk phone:	+1 (707) 299-1170
Criminal Division:	+1 (707) 299-1180

Career History

Career History
Role	Employer	Where
Chief Deputy District Attorney	Napa County District Attorney’s Office	Napa County, California
Deputy District Attorney	San Mateo County District Attorney’s Office	San Mateo County, California