The person at the center of this case
Joan Rosenthal, 75-year-old White female
Homicide · Unsolved
16 years waiting · since 2009
VICTIM - JOAN ROSENTHAL - TIBURON, CALIFORNIA
Justice for Joan Rosenthal, 75-year-old White female — the trail went cold in 2009, but the truth hasn't.
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Key leads to think about
👁️
witness
Lead #1Did anyone in the neighborhood see or hear anything suspicious around 9:00 p.m. on September 21, 2009?
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suspect
Lead #2Why would someone target a 75-year-old widow with no known enemies or conflicts?
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evidence
Lead #3What forensic evidence was collected at the scene, and have ballistics been matched to any known weapons?
Joan Rosenthal, a 75-year-old widow, was found shot in the head outside her Tiburon home on September 22, 2009, with investigators determining she died around 9 p.m. the previous evening. Despite being a well-known community member—a library volunteer with a small circle of friends and no known enemies—her killer remains unidentified. The case remains unsolved, and investigators continue to seek information from anyone who may have witnessed activity at her residence that September evening.
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More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
⏰
timeline
Lead #4Was there any unusual activity at or near the residence in the days or weeks before the homicide?
Have information about any of these leads?
Even the smallest detail could be the key to solving this case.
Official wording
Source Narrative
Tiburon, California September 21, 2009 On September 22, 2009, at approximately 10:00 a.m., the body of Joan Rosenthal, a 75-year-old White female, was discovered outside of her residence in Tiburon, California. Tiburon is a small town located approximately 20 miles north of San Francisco.
Rosenthal was found by her housecleaner inside her enclosed front yard near her front door. She had sustained a single gunshot wound to her head.
Investigators determined the time of death to be approximately 9:00pm the night before on September 21, 2009. Rosenthal was recently widowed and living alone.
She was a grandmother, library volunteer, had a small circle of friends, and did not travel much outside of Tiburon. Her homicide is still unsolved.
Anyone with information is urged to contact the Tiburon Police Department.
Timeline of Events
👤
2009-09-21
21:00Estimated time of death
Joan Rosenthal was shot in the head at approximately 9:00 p.m. outside her residence.
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2009-09-22
10:00Body discovered
Housecleaner found Joan Rosenthal's body in her enclosed front yard near the front door.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:September 21, 2009 at 9:00 PM
Last Updated:April 29, 2026
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Case Information
Incident:September 21, 2009 at 9:00 PM
Last Updated:April 29, 2026