Trivia: This is the only Friday The 13th Film, First (1980) to X, or the 10th (2001), that Jason's face isn't seen.
Suggested correction: This is not the only movie where Jason's face is never shown. In Friday The 13th: A New Beginning Jason's face is never shown either.
Other mistake: Where were the crime scene people? Jessica goes to her mom's house and her friend from the diner is cleaning up the blood? Highly unlikely.
Suggested correction: We don't know how much time has passed since she was killed. Crime scene people would have come and gone. And what's wrong with her friend cleaning up the blood? She's just being a good friend.
I highly doubt in a murder scene the police would make you clean it up! Think about that.
That's absolutely what happens: https://www.aftermath.com/content/who-cleans-up-murders/. https://www.biohazardresponse.com/blog/three-things-you-need-to-know-when-your-home-is-a-crime-scene/ Once evidence is dealt with, everything left isn't the responsibility of the police to clean up. Most people would hire cleaners rather than do such an unpleasant job themselves, but it's the responsibility of the property owners to clean.
That's just your opinion. Unless you know police procedure in every state then you can't make that assumption.
Continuity mistake: When Debbie is in the tent with her boyfriend, she gets a condom out of the wrapper and throws it aside, still in the tent. Later on, the wrapper is outside the tent, because we see Jason step on it.
Suggested correction: We see her toss it. Don't see where it landed. Could have easily gone out the tent flap.
