Theresa Jimmie Francine Knorr is an American woman convicted of torturing and murdering two of her six children while using the others to facilitate and cover up her crimes. She was acquitted of murdering her first husband and was also considered a suspect in the unsolved murder of her sister. She is currently serving two consecutive life sentences at the California Institution for Women in Chino, California.

California Institution for Women (CIW) is a women's state prison located in the city of Chino, San Bernardino County, California, east of Los Angeles, although the mailing address states "Corona," which is in Riverside County, California.