Under what condition is Miranda warning required?

The requirement for Miranda warnings is triggered when a person is both in custody and subject to interrogation. This means that if an individual is deprived of their freedom in a significant way and is being asked questions that are likely to elicit incriminating responses, law enforcement must inform them of their rights to remain silent and to have an attorney present.

This necessity arises from the U.S. Supreme Court's ruling in Miranda v. Arizona, which established these protections to ensure that individuals are aware they have the right to avoid self-incrimination during the stressful circumstances of police questioning. Therefore, both elements—being in custody and being interrogated—must be present for Miranda warnings to be mandatory.

Options that mention detention, arrest, or questioning without the freedom to leave may be related concepts, but they do not fully encompass the specific legal threshold that triggers the requirement for Miranda warnings.