Why mother's never go to the police!

I watched an episode of Dr. Phile two days ago that showed of a woman who molested and her mother knew about it and never made a police report, and she claims that she did but her daughter claims that she didn't and she doesn't want her mother to be in her daughter's life, you don't go on living your life conceling a crim that has been comitted in your own home you have to file a police report so the person who raped you child will be facing jail time in prison. But most of all don't shut your mother out your life who want's to try to reconcile with you, because if you don't give her the chance you will come to regret it for the rest of your life.