Caregivers at a hospital owned by scandal-plagued Tenet ( THC) now face murder charges. One doctor and two nurses who worked at Memorial Medical Center -- where 34 patients died in the aftermath of Hurricane Katrina -- have been arrested on suspicion of second-degree murder, a spokeswoman for Louisiana Attorney General Charles Foti confirmed on Tuesday. Dr. Anna Pou and nurses Cheri Landry and Lori Budo were arrested Monday night, the Associated Press reports. The arrests followed months of investigation by Foti's office and came the same day Tenet announced a deal to sell Memorial and two other New Orleans hospitals to a nonprofit operator. Memorial has been shuttered since employees evacuated the flooded hospital after last summer's devastating hurricane. The death toll there far surpassed that seen at other hospitals in the area. "We're not calling this euthanasia," Foti spokeswoman Kris Wartelle told the AP Tuesday. "We're not calling this mercy killings. This is second-degree murder." Memorial counted 10 of the dead patients as its own, with the rest admitted by a long-term care provider that operated inside the hospital. Workers there struggled to care for the patients under horrific conditions -- with water rising and temperatures soaring past 100 degrees -- as they waited for days to be rescued. For its part, Tenet has regularly portrayed its employees as heroes who performed admirably throughout the disaster. But Jim Moriarty, an attorney who has won two major settlements on behalf of Tenet patients in the past, now believes the company could face big legal bills once again. "Tenet has a fiduciary duty to protect its patients," Moriarty says. "The company is absolutely responsible for its nurses and its staff. ... They're going to wind up paying real money to the families of the people who were killed."