The person at the center of this case
Joan Rosenthal, 75-year-old White female
Homicide · Open
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
🎯
suspect
Lead #1Who had access to Joan Rosenthal's residence and knowledge of her daily routine?
🔍
evidence
Lead #2What type of firearm was used and can ballistics match it to any known weapons?
👁️
witness
Lead #3Did any neighbors see or hear anything suspicious on the evening of September 21, 2009?
On September 21, 2009, Joan Rosenthal, a 75-year-old widow, was shot once in the head at her Tiburon home and discovered by her housecleaner the next morning. Despite investigation, no suspect has been identified and the motive remains unclear. Anyone with information about this unsolved killing is urged to contact the Tiburon Police Department.
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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.
💡
clue
Lead #4What was the motive—was this a robbery, targeted killing, or random act?
👤
person
Lead #5Were there any recent changes in Rosenthal's life or relationships that might suggest a motive?
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 once in the head at approximately 9:00 PM on September 21, 2009 at her residence.
🔍
2009-09-22
10:00Body discovered
Joan Rosenthal's body was found by her housecleaner inside her enclosed front yard near her 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:May 14, 2026
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Case Information
Incident:September 21, 2009 at 9:00 PM
Last Updated:May 14, 2026