A proverb expressing the principle that suspicion alone is not sufficient grounds for punishment; akin to the legal maxim 'in dubio pro reo' (when in doubt, rule for the defendant).
証拠が不十分なら、疑わしきは罰せずという考え方を尊重すべきだ。
If the evidence is insufficient, the principle that suspicion alone should not lead to punishment ought to be respected.
弁護士は『疑わしきは罰せず』を主張して、被告の無罪を訴えた。
The lawyer invoked 'in dubio pro reo' and argued for the defendant's innocence.