Yes, but investigations are often conducted with most favourable outcomes.
That is an opinion that has been stated about most investigation bodies e.g ATSB,NTSB,TAIC,AAIB,Dutch Safety Board, TSBC etc, etc etc. If the outcome is not what an individual would like to see i.e.total exoneration, then the investigation is accused of being biased and flawed. Sometimes the criticism is deserved but at Jetstar in the present time investigations are conducted independently of flight ops.