When do they take the turn

Every time I cross, the Police Training ground near Avadi, I used to wonder about the kind of training they are given whatever be the climate or the season. They are given very hard and stern training on the ground since morning to whatever the time I do not know. I have also read about the police training in magazines and movies. They all might have been trained for good governance, service to the society, etc., etc. Further, I also believe that nobody joins police with an objective of indulging in anti social activities.

But, I surprise, when do they take the turn and what makes them to take the way to corruption, bribery, taking the power in their hands, indulging in scandals, harassment, atrocity, etc. Even the so called genuine police officials would have taken the power in their hands at times. Every policeman irrespective of the grade, they turn to this dark side at least once in their career.

When and how they turn to this darker side???   Peer / Top Pressure, society, family or is it the power which is given to them, That unknown turning point - where and when does it start ??? Million dollar question !!!