Katrina Turner lives in Fair Oaks, outside of Sacramento. She’s 43, nonverbal and developmentally disabled. Katrina lives in a special kind of group home for people who need a lot of support day to day. She has a history of self-injury, so the group home is required to monitor her 24/7. But Katrina’s family was alarmed when a staff member reported finding bruises and marks on her body. They suspected something was seriously wrong. This week, we’re bringing you the results of a year and a half long investigation into allegations of abuse at one of California’s most tightly regulated group homes, the “Illinois Home” in Sacramento County. Reporter Chris Egusa spent months collecting stories from parents, testimony from employees, and documentation from state agencies. And what he uncovered suggests that Sevita Health, a national health care company, may have allowed, and even contributed to the abuse of the very people it was supposed to protect.