Wow, ok, so I finally found out what happened after I called the cops: Some welfare people went round there while my friend and her siblings were at school (only the abusive Dad was home, since he's unemployed and on the doll) . They found the living conditions and environment in the house "unacceptable and inappropriate for minors to live in" and the Dad "unfit to raise kids" so they took my friend and her siblings off him and put them in temporary foster care

The cops are going to charge the Dad with neglect and possession of some sort of drugs... Unfortunately they can't charge him with child abuse, since my friend is still in denial about the whole thing, so she won't tell the cops or welfare people that he hit her, beat her up etc
She seems alright, just a little freaked out and a bit nervous

She doesn't have to go to school for a while, because the school gave her compassionate consideration, but she wants to after the weekend anyways, which is good

She's going to get counseling as well, which will hopefully help with the denial thing... She did have a go at me later about how "she doen't like other people trying to run/control/interfere" with her life, which I guess was directed at me

But she still wants to be friends