Continuity mistake: During the love scene Ethan has his left hand on Angelina's throat, but then it changes and it is his right hand.
Revealing mistake: Matt, the boy killed at the beginning, has very short hair. His dummy (the one hit by the white van) has much longer hair. (00:05:40)
Factual error: During Angelina and Ethan's "love" scene, they climb onto the table and smash what is quite obviously break away glass. No glass smashes that easily when merely touched.
Answer: As "Costa" was initially a suspect, the police took a DNA sample, which did not match any DNA on file - that was what they meant by "he's clean." It basically means that Asher was very careful at not leaving DNA evidence (other than that of others like Hart to frame them). Presumably the real Costa had no DNA profile linked to his identity on file either, or it could have returned a mismatch and revealed Asher's deception.
Sierra1 ★