Disgusting creatures. Why the heck were all these kids "partying" with alcohol and Xanax anyway? Even with that in mind, the attack is not the victim's fault, particularly since these thugs started on him after he objected to their approach to his 12 year old sister. But you have to wonder why any mother would be peacefully sleeping through a "party" in her house that involved teenagers, alcohol and Xanax.
Disgusting is right, probably mom's Xanax and alcohol if she's sleeping through this.