Can't win either way

I watch a lot of true-crime shows. When interviewing the detectives, they say their suspicions of suspects increases when they ask too many questions. Or, their suspicions are raised when suspects don't ask a lot of questions and seem too detached.

If a person of interest (let's say relative), is too emotional, crying, they're overreacting and that's suspicious. If they under react, according to detectives' subjective judgement, that's suspicious and they don't seem to care.

No wonder people lawyer up.