Conversation so far:
Where was Black Dahlia discovered?
Elizabeth Short's body was found in Leimert Park, Los Angeles.
Who discovered Black Dahlia's body?
Local resident Betty Bersinger discovered the body at approximately 10 a.m.
What was the date of discovery of Black Dahlia's body?
On the morning of January 15, 1947, Elizabeth Short's body was found.
Do the authorities know how long Black Dahlia's body had been in Leimert Park before she was found?
Medical examiners determined that Elizabeth Short had been dead for around ten hours prior to the discovery.
Was anything else discovered at the scene where Black Dahlia's body was found?
Elizabeth Short's naked body was found severed into two pieces.

Question: Did they find out who did that to her?
Self-contained rewrite: Did the authorities find out who murdered Black Dahlia?