Dog abuse laws?

I moved to CA from UT and I brought a 9-week-old border collie puppy with me to share with my roommate I met on Craigslist. When he met her he basically claimed her as his own. I decided to just roll with it cuz he seemed to take care of her well. Two weeks later, My roommate keeps her in a crate for 9-12+ hours a day. He won’t let me take care of her but I do my best to sneak around and do it when he’s not home. I work 12 hour days but I come home twice to let her out and give her water because he doesn’t. (Even though he only works 4 hour days) She is very dehydrated, she drinks a liter of water in seconds. The past week, every night when I come home, she is covered in **** and the blankets in her kennel are soaked with pee and poo. I bathe her every single night. The kennel is too small for her to turn around. He still hasn’t gotten her vaccinated and he takes her to dog parks. I gave him this puppy for free in the beginning and I want to give her to a family that will take care of her. (I would totally take care of her but I know he will just end up locking his door so I can’t get her.) I just don’t know how to get away wit it. I’ve told him SO MANY times that what he does is abuse and neglect. I’m moving out at the end of this month because my roommate is a terrible person. He is supposed to refund my $900 deposit when I move out but I’m afraid that if I take the puppy he won’t give it to me. I’m thinking I just won’t tell him and I’ll sell her when I leave. Thoughts?