Sleepaway Camp 3: Teenage Wasteland (1989)

Synopsis
Angela (Pamela Springsteen), the murderous camp counselor of Sleepaway Camp 2, returns to the scene of her crimes in this no-frills installment. Assuming a camper's identity (after mowing her down with a Mack truck), Angela arrives at Camp Rolling Hills, which was purchased and renamed "New Horizons" after her last killing spree. Husband and wife entreprenurs Herman and Lily (Michael J. Pollard and Sandra Dorsey) have reopened it as an "experiment in sharing" to bring street-smart disadvantaged kids together with snobby rich brats. Splitting up into three groups of culturally mixed teens, they go off into the woods for a camping trip designed to break down barriers. Instead, Angela finds a myriad of reasons to off her fellow campers (thanks to their constant bad behavior), and gets the job done with axes, tent spikes, a lawnmower, and firecrackers up the nose. Even the presence of an off-duty police officer (Cliff Brand), who is familar with Angela's crimes, doesn't deter her from slaughtering everyone for the merest provocation. ~ Fred Beldin, All Movie Guide