The state Attorney General’s Office is investigating the circumstances that led to the death of a woman in a Paterson police holding cell. The woman, 57 years old, was not immediately identified; she died Friday. The attorney general’s announced the woman’s death and the investigation on Monday evening. The office said an EMS unit was called to Paterson Police Headquarters at about 6 p.m. Friday when an officer conducting a prisoner check found her unresponsive while lying on a bench in a holding cell. Medical authorities pronounced her dead in the police department at 6:16 p.m. Paterson polic…