Politics isn't confined to a national stage when it comes to questioning citizens who have nothing to hide. That's the hook that a government or law enforcement agency may use to entice an individual into a situation where they lower their guard, making the assumption that being frank will protect them from unfounded accusations.
It doesn't work that way when there is an underlying agenda. Such may occur in an investigation that has not turned up enough evidence to charge anyone with a supposed crime. It could also occur to seek or fabricate a crime that can be attached to an individual targeted for different reasons – political connections, financial investment, religious belief or simple hatred. As a rationale, hatred is founded in control issues in that the person or organization pigeonholed is viewed as a hindrance or disruptor to obtaining and/or retaining power. From this, no one is immune, including those who've aligned themselves with the power brokers should they become inconvenient.