Which episdoe was this?

The episode where T.J. is doing a report or something about a girl who had murdered her parents. There was some rhyme he would say, but all I can remember about it was that she stabbed her mother 40 times and her father 41 times.
So later in the episode, I forget why, but Yvette and her friends dress up in yellow rin ponchos and these creepy pig masks and chase the guys (T.J., Mo, and Marcus) around the house, chanting the rhyme. I always remembered this episode becuase it used to scare the sh*t out of me when I was little, especially this one shot of one of the girls dressed up running across their driveway. I could never sleep after that episode was on T.V.