Ellen Holloway and Carla Lewis killed Jennifer Anne Monroe because they were extremely jealous. Jenny was popular with the boys and Ellen and Carla were not and that was the whole motive for murdering her. They didn't want her around anymore. So they hatched a sophisticated plan to eliminate their competition forever. On the day of the murder, Carla made arrangements to pick up Jenny on Saturday on the pretense of hanging out at the park. Jenny had no idea she was in danger. She and Carla drove into the woods where they met up with Ellen and Kathy. That's when Ellen triggered the rest of the plan staging a fake fight with Carla to throw Jenny off-guard. So Jenny got out of the car to break up the fight but then, Ellen and Carla dropped the charade and turned on Jenny. They harbored a lot of rage for her. So made her go into the trail area leading to the creek. They beat her up. Ellen and Carla were hitting and torturing and cutting Jenny's hair. Kathy Pearl who was brought along for the murder did nothing except run back to the car because she wanted none of the violence. Ellen and Carla intensified their assault. They pushed her down underwater. Ellen held Jenny's feet and Carla held her down until the bubbles stopped and then both of them placed a log on Jenny's head to finish the job. Ellen rushed off to a family gathering inwardly celebrating the elimination of her thinner and prettier rival and Carla went home to call Jenny's mother, Jean pretending to be worried concocting the phony story about the guys in the red monte carlo. Kathy was sworn to secrecy or suffer the consequences.