How did the girl realize that the other couple were the murderers in a perfect getaway the movie?

Answer:
she was looking through the pictures on their video camera & she saw a picture of the people who were murdered in Honolulu. They look similar to cliff & cyd but arent them :) cliff & cyd are the killers
First answer by Olpyphant10. Last edit by Olpyphant10. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 1 [recommend question].