Student Fallout

This is the predecessor of the famous horror film Scream, one of the few black comedies in the early 1980s, a spoof style, and a very interesting youth horror film. The plot is also about Halloween night, when high school students all die violently, and the commonality is that they are all killed while making out. The heroine Toby is a high school student. Because all her old friends are dead, and the arrow points to Toby as a serious suspect, how should she step forward and catch the real murderer based on the clues? It must be someone in the school who did it! Is it the principal, the principal’s secretary, a teacher, a coworker, a nurse, or a psychiatrist?