Who determines if coercive measures have been applied during detention?

The determination of whether coercive measures have been applied during detention ultimately falls within the purview of the court system. This is because courts are responsible for upholding legal standards and ensuring that an individual's rights are protected according to the law. When an issue of coercion arises, it is the court that examines the evidence, testimonies, and circumstances surrounding the detention to assess if any unethical or illegal methods were employed.

The court's role is crucial because it provides an impartial review, allowing for accountability and fairness in the policing process. The courts apply legal standards to determine if the actions taken by law enforcement meet the necessary constitutional requirements. This evaluative process ensures that measures taken during detention do not infringe upon fundamental rights or employ excessive force.

In contrast, the other choices involve individuals or roles that may not have the authority or comprehensive perspective to assess coercive actions definitively. While the arresting officer and supervising officer may witness and report on the behavior during the detention, they lack the judicial capacity to make final determinations on legality or coercion, which is why the court system is the correct answer.