|Family|| Unnamed parents (both deceased)|
|Modus Operandi||See below|
|Portrayed By||Cynthia Gibb|
In 1971, it was believed that Kathy's parents were killed by a transient and that she was abducted by the same person. In actuality Kathy's parents were killed by a Romani family, who then abducted her from her hometown of Vienna, Virginia. As part of their ritual, she was inducted into the family by marrying the son, who rechristened her with the name "Sylvia". Kathy soon developed Stockholm syndrome, slowly growing accustomed to the family's superstitions and rituals and came to participate in them as well as fully accepting her new identity as Sylvia. She eventually had children with her husband and helped in the ritual of acquiring her sons a wife. Years later, in 2009, Kathy participated in the ritual of gaining a wife for her youngest son. Her husband and son murdered Geoff and Nancy Hale and all three abducted the daughter Cate. In their RV, she and the others treat Cate normally, ready to induct her into the family, but when they realize she is epileptic after suffering from a seizure, they discarded her at the side of a lonely road, where she is eventually rescued.
Meanwhile, Kathy aids her husband and son in abducting Lynn Robillard, with Lynn's parents being killed. When the BAU begins handing out flyers with Kathy's face on it, Kathy's husband convinces her to turn herself in, as she would be easily recognizable and therefore a loose end, while he hides the son and Lynn. Kathy turns herself in to authorities, and she is eventually interrogated by Prentiss and Hotch, who are initially unable to get anything from her due to her loyalty to the family. They eventually intimidate her into revealing Lynn's location by showing her the crime scene photos of her murdered parents, which illicit an emotional response from her. At the end of the episode, Kathy reunites with her son and says something in Romanian. An appointed translator reveals that the sentence meant that the son shouldn't tell a word about his brothers. Due to her voluntary involvement in the murders, Kathy was most likely incarcerated.
Kathy didn't directly participate in the murders of the parents, instead helping her husband and son abduct the chosen girl by driving up in a car, helping them stuff her into the trunk, and then drive away. She would then help the captives calm down by telling them that she went through the same process and that it would all be fine.
- Cate Hale (abducted; was released)
- Lynn Robillard (abducted; was rescued after Kathy's capture)