Why did you come up with the truth seeker? I have a question for you. Do you have a mother, a sister, a daughter? Either listening to bible verses, or your great grandparents. The old saying, Treat others as you want to be treated work very well. If you were a girl/woman, and being abused would you not want someone to help you? if your mother, sister, or daughter was being abused would you not want someone to help them.
There is a philosophy that those who can should, those who are not sure they can should at least try. And those who can not, should ask for help.
I am sorry to be hard on you, but the fact that you need to ask if you should be a decent, mature, caring, adult, means you are not one fully yet. If you know someone is being hurt, why would you not try to help in some way. At the very least send an anonymous, letter, email, or phone call to the police. A lot of people know about abuse, and doing nothing. There is a quote: All it takes for evil to survive, is good men and women to do nothing. But if a man or woman does nothing, when they see an injustice, then they are not a good man or good woman.