Before taking a person believed to be mentally ill into custody without a warrant, a peace officer must have a belief based on all of the following EXCEPT which one?

In the context of mental health interventions and the criteria for taking a person believed to be mentally ill into custody without a warrant, it is essential for a peace officer to have a clear basis for their actions. The officer's belief must be supported by objective criteria that demonstrate the individual's need for intervention.

An officer can take a person into custody based on a request from a doctor, who can provide professional insight into the individual's mental state. Additionally, a request from a family member may carry weight, as they often possess intimate knowledge of the individual's behavior and mental health history. Moreover, the actual behavior exhibited by the individual is a crucial factor; it provides observable evidence that raises concern for the person's safety or that of others.

In contrast, while a request from any person could potentially hold some relevance, it does not fulfill the necessary criteria established for mental health interventions. Without the professional authority of a doctor or the familial connection that might lend insight, a mere request from a person does not substantiate the immediate need for custody on the basis of mental illness. Therefore, peace officers must focus on more reliable indicators and sources of information before deciding to take someone into custody under these circumstances.