To function effectively in the ED, mental health clinicians must be able to: Competently evaluate and manage psychiatric patients in acute crisis. Obtain informed consent for treatment or procedures from patients or substitute health care decision makers. Develop clinical data about patients from collateral sources, such as family members and current treaters. Retrieve records of previous admissions to the ED or hospital psychiatric unit. Conduct competent suicide and violence risk assessments that direct clinical interventions. Conduct risk-benefit assessments before discharging suicidal or potentially violent patients. Observe basic safety precautions and procedures with potentially violent patients. Work with community mental health facilities for the follow-up care of chronically mentally ill patients. Possess a working knowledge of the legal regulation of mental health practice, especially as it applies to evaluating and treating patients in the ED. Obtain legal consultation when in doubt about matters of law affecting patient care.