investigators have released a sketch of a woman whose body was on May 24.
Investigators say the coroner's office has determined the woman was most likely Asian or Hispanic and between 20 and 40 years old.
They also say the woman had shoulder-length dark hair, was 5 feet 6 inches tall and weighed about 130 pounds.
She was found wearing an Old Navy shirt and pajama bottoms. She was also wearing blue fingernail polish, red toenail polish and had three ear piercings in each ear with distinctive earrings. She had no tattoos or other distinctive markings.
The cause of her death has not been determined. Investigators say the body was intact and was not in a bag when it was found. Authorities still don't know how long the woman had been dead.
Investigators were able to get fingerprints from the body, but those prints don't match anything on file.
"If we can figure out who she is, then we start tracking a suspect," said Pleasanton Police Lt. Jeff Bretzing.
Anyone with information about the case should call Pleasanton police at (925) 931-5100.