The person at the center of this case
Joan Rosenthal
Homicide · Unsolved
16 years waiting · since 2009
VICTIM - JOAN ROSENTHAL - TIBURON, CALIFORNIA
Justice for Joan Rosenthal — the trail went cold in 2009, but the truth hasn't.
Start here
Key leads to think about
🔍
evidence
Lead #1Single gunshot wound to the head - what was the caliber and trajectory, and does it match any known weapons?
🎯
suspect
Lead #2Who had access to the property and knowledge of Rosenthal's routines and schedule?
👁️
witness
Lead #3Were there any neighbors who heard a gunshot or saw suspicious activity on the evening of September 21?
On September 21, 2009, Joan Rosenthal, a 75-year-old widow, was shot once in the head at her Tiburon home and discovered the next morning by her housecleaner. Despite investigation, no suspect has been identified and the case remains unsolved. Anyone with information about this homicide is encouraged to contact the Tiburon Police Department.
Try asking
Claim this imported case
A one-time $10 claim transfers this imported case workspace to your account. You get 10 uploads for this case, 25 daily AI questions for this case, and public tips with files route to you.
10 uploads25 AI questions/day
This does not start a subscription. When the included limits are reached, the Personal plan unlocks more workspace capacity.
More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
👤
person
Lead #4What was Rosenthal's financial situation and who stood to benefit from her death?
💡
clue
Lead #5Why would someone target an elderly widow with limited travel and a small social circle?
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 at approximately 9:00 PM on September 21, 2009
🔍
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:September 12, 2026
Leave a comment
Comments
Case Information
Incident:September 21, 2009 at 9:00 PM
Last Updated:September 12, 2026