Her hands and feet had been bound. Authorities identified her by using dental records.
Friends and family members remembered Stephanie Sunday night.
"She's a jewel to me, she was priceless," said Stephanie's father, Richard Almanzan, "and she was a mom. I mean what kind of person does this to another human being, to a mother, to my baby?"
The victim and her family live in Whittier.
Police are searching for suspects and trying to uncover a motive.