Regardless of the cause one thing is for certain. If we are to criminalize aircraft accidents, then we are going to set airline safety back 50 years. Instead of working together with authorities during accident investigations airline personnel, if they are smart, will dummy up for fear of prosecution. It started with Value Jet and continues today.
Mistakes happen. Do you acutally think that any mechanic, pilot, or otherwise goes to work thinking "I think I will cause an accident today"? Hardly.