Yet another thing to yell during Halo 2. When someone gets a double kill they're supposed to yell "Scott Peterson, double kill" because we all know that Scott Peterson killed his wife and unborn child. It can Also be used when betraying 2 team members.
I was crouching around the corner and 2 n00bs ran by... SCOTT PETERSON, DOUBLE KILL!
A guy who's wife disappeared. Later, she mysteriously turns up in the bay exactly where he was at the time of her disappearance. When they find her body, he's picked up near the border of Mexico with survival equipment, a bunch of cash, and Viagra.
Scott Peterson obviously was responsible for his wife's death. Don't be stupid.