Given the question: I am trying to decide whether it's worth it to invest in this film proposal. Can you help me answer a few questions? If you can't, please say "No I can't". Question: Why does the killer take their frustrations out on innocent people? Movie title: Death Screams Movie plot: During the last night of the carnival, several locals, including newly in-love couples Bob and Kathy, and Walker and Sheila waitresses timid blonde Lily and comely, nubile Ramona, along with her lover Tom, plus prankster Diddle and his girlfriend Sandy, decide to spend the night down at the river, where a double homicide occurred some nights before. But among the fairgoers is the one responsible for the deaths. Troubled over a tragic past, the killer decides to take his/her frustrations out with a machete on those he/she blames for all the misfortunes in his/her life. Following the group back to his/her riverside stomping grounds, he/she sets about ensuring no one leaves the area alive.
The answer is:
Troubled over a tragic past