When can a suspect waive Miranda rights before police questioning?

Suspects in police custody may waive their Miranda rights and choose to speak with law enforcement at any point during the process. For such a waiver to be considered valid in court, it must be performed "voluntarily, knowingly, and intelligently".12

It is important to note that suspects are not required to explicitly state that they are waiving their rights; rather, they must "unambiguously" invoke their right to remain silent or their right to an attorney to stop police questioning. If a suspect does not clearly and expressly invoke these rights, they may be deemed to have waived them, even if they remain silent for a long period before eventually speaking.23

Because the Fifth Amendment privilege against self-incrimination is a fundamental protection, it is essential that individuals understand their rights to ensure they are not inadvertently coerced into providing self-incriminating evidence. Most suspects, when informed of their rights, choose to waive them and proceed with questioning.13