How do we show are sons

I left an abusive marriage more than eleven years ago, but the abusive has not stopped.

December 15th 2013, my ex-wife broke into my home and within an instance began beating the hell out of me in front on my thirteen-year-old son. When my son starting screaming at his mother what are you doing, I thought in that instance she was stabbing me with a knife, and my only thought was to try and protect my son from his mother killing are son.

 I was running on adrenaline thinking I was going to fall dead any second and knew I had to protect my son; I was able run out of the house.

I was on the phone with 911 when the Police arrived. Thinking my ex-wife was going to jail and the devastating effects this would have on our son. The police took statements and to my amazement left without making an arrest.

So I began the long argues attempt to address the issues with the Police Department, Department of Human Services, and the District Attorney, but ran into such criticism at each turn to the point it seemed I was from another planet.  

After several mouths I was granted access to the police reports, and then I realized why they had not made the arrest, the police officers had falsified the police reports, omitted evidence and what I felt had not followed police procedures.

I have filed several complaints and the replies that I have received from the City Attorney and the Police Chief is how I can possibly submit my son to my lies.

What has my son learned from this….why leave an abusive relationship?