Plot hole: When Marty, Ali and the hitman go back to the crime scene, they go over to the water where they threw Bobby's body. Marty throws up, leaving his DNA at the crime scene. And since he was Bobby's best friend, he's the number one suspect.
Bully (2001)
1 suggested correction
Directed by: Larry Clark
Starring: Nick Stahl, Brad Renfro, Bijou Phillips, Rachel Miner
Continuity mistake: When Marty and his girlfriend are laying in bed together after engaging in physical relations, Marty lights a joint. It starts off small, but when his girlfriend smokes it then passes it back to him, the joint is longer.
Bobby Kent: You enjoyed that back there, didn't you?
Marty: No way, man, I ain't queer like those guys.
Bobby Kent: Yeah, bullshit, bullshit, I think you like dick. You don't gotta lie to me, boy, I know you like dick.
Suggested correction: Vomit doesn't contain DNA, unless said vomit contains blood.
Untrue. "While not all these bodily substances provide ideal DNA samples, testable DNA can often be extracted from all of them. In every case, what is being tested is the DNA contained in cells of human tissue, whether found on their own or carried by another substance, like earwax, sweat or mucus. Shed cells are also found in urine and feces, vomit, and even tears." https://www.nytimes.com/2010/11/02/science/02qna.html. Also https://www.mirror.co.uk/news/uk-news/violent-thug-caught-dna-vomit-4017184 "A violent thug who glassed a man in the face has been jailed after being traced down by DNA in his vomit."