answer to my questions

What happens if the person who was executed and later found to be innocent?

 

In Japan, the Minister of Law will make an apology and if the family is still alive, government will pay for the family indemnification.

However, when the police or prosecution were hiding some evidence or were faking some evidence, the person who knew about the cheat will of course get punished.

 

"【冤罪】袴田さん４８年ぶりに釈放。無罪確定なら「四大死刑冤罪事件」に５番目のケースが加わることに。 - NAVER まとめ." NAVER まとめ. 28 Mar. 2014. Web. 14 July 2015. <http://matome.naver.jp/odai/2139593419071631901>.

 

"もし、この日本で死刑執行後に無実が証明されたら、法務省のお偉いさんはどんな処分を受けますか？." Yahoo!知恵袋. 24 Jan. 2011. Web. 14 July 2015. <http://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q1154076976>.