Who can I contact to report work abuse?

First: There is no HR Department here, read more:

What if the person committing the abuse is the owner of the company. I am currently employed at this family ran company comprised of about 30 employees. Mind you, this is an Asian family owned company, and me being Asian, men have strong wills. The owner of the company is the uncle and husband of 3 other managers here. The non-related Manger is Caucasian, and he is our "appointed HR manager" that does nothing HR but set up interviews after the agency finds someone.

The owner of the company has been known to be-little his employees, and this last week I just had enough! I heard him from all the way from 7 offices away yelling at one of my co-workers to the point where she cried and ran out the door. What can us employees do in a situation like this? None of the managers will stand up to the owner because he is superior in position in the company and at home!?

Why did the owner yell? Bare with my story:

The owner has a habit of asking tons of questions thinking that you will "remember" every single issue you work on even if they are 3 months past. He sent an e-mail asking for update on 3 different issues the week prior. On the same day, I replied and copied all parties stating one is complete, the other two was not assigned to me. But I did call CO-1 to confirm if issues were completed and was told "yes". The next day, right when I just clocked in, the owner approaches me and asks for the same status, and I repeated what I said on the e-mail. Than he went to CO-1 to inquire, she was unable to respond Instantaneously since she was dealing with several more critical issues, he was angry and started scolding "what do I pay you for, you always just have pending work, blah blah blah" She only gets $12/hr plus they put her on salary so her pay is capped out, she's been working her for over 7 years... HOW DEGRADING!!! and on top of her loyalty, she gets this shitty treatment. Not the first time BTW...

Anyway, my co was not wrong, it was CO-2 that was assigned the issue and she worked with one of the managers, the Owner's Niece.

All in all the problem escalated because CO-2 did not update the owner in time. Nevertheless, it is WRONG to publicly humiliate your employee.

Who do I report this to within the Los Angeles, CA district. There is nothing internal I can do, can I get them audited or something?