DS, I'm a hateful individual, and while the kid is probably a sack of shit, probably always will be, and he may even deserve death, this isn't acceptable. Everyone in that room when this was happening honestly deserves to be bled out slowly while being shocked.
First, line them all up tied to chairs and then go down the line with a hammer and smash in their kneecaps. Doing it in order will ensure panic from the one who knows he's next. Then, go back down the line with a knife and slice each person 5-10 times in a non lethal area. Once they've "given up" you bring out the bolt cutters and start removing their toes and then, ultimately, their fingers. Finally, cut out half of their tongues so they can still try to beg for mercy. Then turn on the electricity and leave it on until they're all dead.