Allowing a criminal to live in your house puts the whole family at risk. What if he does something that prompts the police to SWAT him, and by extension you? And then there is asset forfeiture; people have lost their homes because their adult child that lived with them got busted with drugs.
If I had a family member that was up to that kind of shit, I might help them pay rent in a home of their own, but they would not be staying in my home.
Also, not to downplay what they've been through, but her brother's transgressions against the family hardly seem worth kicking him out over. He pawned some musical equipment and tried to sneak whiskey into his room, and left a bruise on her arm? For that they permanently kick him out? I realize he broke into other people's homes and stole from them, and that sucks but he's also paid for those crimes.
Maybe she's leaving out some things he did, I don't know. But to me this article reads like she and her parents are harder on her brother than he deserves. Hopefully it all works out.