Its understandable that you might hesitate actually confronting the abuser. But to remain silent, and not go to the authorities, is almost as bad as the crime. Call or write to local authorities, which you can do anonymously. There are humane societies when the abuse involves animals. There are shelters for battered women. There are counselors and other professionals who can guide you to the right organization which can help. Silence and apathy do no one any good.