Police today released some new information about the ongoing investigation into the murder of 75-year-old Joan Rosenthal in her Tiburon home this week.Rosenthal’s body was found outside her home around 9:40 a.m. Tuesday by someone who went there to check on her welfare. Investigators believe she was shot at close range once in the head between 6 p.m. Monday and 9 a.m. Tuesday.More than 100 latent fingerprints have been taken from inside Rosenthal’s house at 647 Hilary Drive, according to San Rafael police spokeswoman Margo Rohrbacher, who is assisting Tiburon police with media inquiries about the case. The prints will be classified and entered into an automated fingerprint identification system, which could lead to a match, Rohrbacher said.”Persons with legitimate access to the house will be eliminated from that process,” Rohrbacher said.Investigators also learned there was a party Monday evening across the street from Rosenthal’s home but none of the guests is suspected of the slaying, Rohrbacher said.Detectives would like to hear from the party guests about anything they may have seen or heard, Rohrbacher said. Investigators have not narrowed down a motive and it is not known if the Rosenthal knew her assailant,Rohrbacher said.There is no evidence to suggest Rosenthal had been threatened or was a party or witness to a criminal proceeding, Rohrbacher said.Police also are unaware of any family dispute or any type of probate or estate issued regarding the death of Rosenthal’s husband Ken Rosenthal in January, Rohrbacher said.Anyone with information is asked to call the Marin County Sheriff’s Office’s investigations bureau at (415) 499-7265. Please call the Fugitive Watch hot line at 1-800-9-CAUGHT (1-800-922-8448) or text at 408-355-0999 if you have any information.
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