What term refers to the detention of a person through coercive measures or threats?

The appropriate term that encapsulates the detention of a person through coercive measures or threats is "in custody." This phrase specifically refers to a situation where an individual is deprived of their freedom and is not free to leave due to the actions or authority of law enforcement. It implies that law enforcement has taken control over the person, often following an arrest, and can include scenarios where coercion or threats are utilized to compel compliance or compliance with law enforcement directives.

While the terms "imprisoned" and "confined" also suggest a loss of freedom, they are typically used in the context of someone held after formal legal processes, such as post-conviction imprisonment or formal confinement. These terms are not as closely associated with the initial detention context involving coercive measures. Therefore, "in custody" accurately reflects the situation outlined in the question, emphasizing the coercive nature of the detention rather than the broader implications of imprisonment or confinement.