What are the names of the three boys who spy on the girls?
Trish Devereaux-Craven, an 18-year-old high school senior, decides to throw a slumber party while her parents are away for the weekend. Their neighbor, David Contant, is given the job of checking in on the girls during the night.  She awakes to the sound of her radio and gets dressed shortly before going to school.  Meanwhile, Russ Thorn, an escaped mass murderer with a preference for power drills, kills a telephone repair woman and steals her van.  Trish meets up with her friends Kim, Jackie, and Diane, the girls on her basketball team.  A new girl, Valerie Bates, is invited by Trish, but refuses after hearing Diane talking cruelly about her.  Russ watches the girls leave school from the van and a girl, Linda, goes back inside the school to retrieve a book for a test, only to be locked inside and attacked by Russ, who injures her left arm.  She eventually hides in the shower room, but the killer finds out where she is because of her blood loss, and kills her before escaping to the van.
That evening, the party begins as the girls smoke marijuana and talk about boys.  Valerie lives next door and is babysitting her younger sister, Courtney, while their recently divorced mother is away for the weekend with a new boyfriend.  Diane's boyfriend John, and two boys from school, Jeff and Neil, arrive and spy on the girls undressing. Russ attacks and kills Mr. Contant with his power drill; meanwhile, Courtney is begging Valerie to go to the party, but Valerie protests.  Diane makes out with John in the car and gets out to ask Trish permission to go with him, she comes back to find him decapitated.  Diane tries to flee, but is murdered also.
John Jeff Neil