Hi,
Air safety as an issue seems to have taken second stage to the blame game in Turkey with a criminal case. Criminal cases tend not to improve air safety.
Just trying to understand ...
Indeed .. improvement of safety can be made after the results and the recommandations of the investigators and other legal civil aviation offices and not by a trial of the parties involved.
The trials came usually very long time after those investigations results and recommandations.
The trial is there for punish any who (human .. or corporate ..etc ..) can be the culprit of the accident.
In any case the trial don't have such duty to improve safety.
So the two parts ... investigations and recommandations ... and trial are absolute necessity but are not complementary IMHO.
BTW .. you can't go free if you kill people .. it's immoral.