Why do i feel guilty about calling the police on my dad and sending him to jail?

[Dancer82891]

My mother and father have been married for 28 years 3 kids, he has always had a bad temper and anger problems. Sometimes they would get into fights and he would shove her were she almost falls and has threatened her as well a lock her out of the house. he keeps her away from her friends and family. My mom had a face book page and when he found out he demanded that she'd delete it because he felt that it was like a dating site were you meet men. Mind you he is not familiar with technology and has no idea what facebook is. So she did.

recently my mom reactivated it to keep in touch with some overseas relatives and family. Last night he found out that her page was up and was looking through the facebook page on her ipad acusing her of lying when she did absolutely nothing wrong. He shoved her out of the bedroom. then they kept arguing. i was in my room the whole time, i just could hear what was going on. So then i hear him get louder and then i hear my mother crying and screaming. At that point I jump out of the room and started yelling at him because i saw him move away from her. My mom said that he grabbed her by the neck and choke her and pick her up by the neck and drop her back into the chair she was sitting in. I did not see him actually choke her but called the police in an instant i felt that i had to. i feel so guilty and sad that he was sent away on charges of domestic violence and battery. I felt like i had to help my mom she has spent years taking his abuse and never did anything about it. I was scared for her life and me and my siblings life i had to call the police. i don't know how to cope with this feeling he is my dad but he crossed the line.I love my parents and it tears my heart that this is happening. I also want to add that after the cops took him out the house in hand cuffs he passed by me and said "thanks (myname)" as if it was my fault that he is going to jail. That made me so angry, why would you blame someone else for your actions. I dont understand