After preparation and study by special committee about two years ago, the ICAO issued strongly worded policy change recommendations to those member states that criminally prosecute pilots (and ground support staff) as part of air accident investigations.
Why? The reasoning was simple - criminalization of airline accidents reduces air safety. Data compiled by the ICAO as well as the FSF bears this relationship out.
Countries that routinely prosecute pilots are home to more than a few sizable airlines with safety concerns ranging from 'below average' to 'poor'. Included in the list are South Korea, Brazil, France, Indonesia, and Malaysia. On the other side of that, amongst the large airlines with the highest safety ratings, the overwhelming majority of their home countries' do not criminalize air accidents.