What legal requirement must be fulfilled before a suspect is interrogated?

The legal requirement that must be fulfilled before a suspect is interrogated is the provision of Miranda warnings. This notification is essential to inform the suspect of their rights, particularly the right to remain silent and the right to have an attorney present during questioning. The purpose of these warnings is to protect the Fifth Amendment right against self-incrimination. If law enforcement does not provide these warnings prior to interrogation, any statements made by the suspect may be deemed inadmissible in court, as they were not fully aware of their rights when making those statements. The requirement thus ensures that confessions or admissions during an interrogation are made voluntarily and with knowledge of the legal protections available to the suspect.