I have a question about this. What compels a person to come in for an interview?
Nothing compels them to come in unless they are under arrest. In any other case it would be voluntary. Most people whose name comes up during an investigation want to get their name cleared as soon as possible. You can imagine how stressful being in limbo must be.
The majority of people do come in voluntarily and the majority of them do talk to detectives. The best way for an innocent person to get their name cleared is to answer questions. Most guilty people also talk to detectives. They either try to lie their way out of whatever they did, or confess, or both.
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