Garden Grove Police say they found the victim, identified as Vivian Wolff, in a bedroom Tuesday at the apartment she rented on Flower Street.
Detectives say her son, 28-year-old Jonathan Michael Warner, was last seen Friday.
Police say the woman lived with her son and are considering him a person of interest.
UPDATE: The vict shared a room with her son, Jonathan Michael Warner. Warner has not been seen since Friday (8/2) & considered a person of interest.— Garden Grove Police (@GardenGrovePD) August 8, 2019
If anyone knows his whereabouts or has info regarding this, plz ☎️ Det. DesBiens at 714-741-5810.https://t.co/J6h2R0TOXF pic.twitter.com/3RO21cRsql
Investigators say they want to question Warner to make sure he and other relatives are safe.
The case is being investigated as a homicide.