Who said "Dude, you can't just go around killing people!"?

This quote is attributed to Cartman.

Dude, you can't just go around killing people! - Cartman

"Dude, you can't just go around killing people!"

Cartman Justice

"Screw you guys, I'm going home!"

"I'm not fat, I'm just big-boned!"

"You will respect my authority!"

"Hippies, they're everywhere!"

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."