A client with depression and behavioral changes is transferred from a local assisted living center to the emergency department. the nurse notes that the client cries out when she approaches. when the nurse gains the client's confidence and performs an assessment, the nurse notes bruising of the labia and a lateral laceration in the perineal area. when the nurse asks the client about the injury, the client shakes her head and begins to cry "don't tell, don't tell." the nurse suspects sexual abuse. how should the nurse proceed?