West Memphis police cars in the movie are correct in terms of make, model and markings. But the lightbars used are red & blue. West Memphis patrol cars have always featured all-blue warning lights.
During the daytime scene at the dead-end where police and media are gathering there is a news van with markings that read "KQWK 17 News - West Memphis." There are no TV stations based in West Memphis, Arkansas. West Memphis gets its local television news from Memphis, just six miles away, across the Mississippi River in Tennessee.
West Memphis, Arkansas is situated along the Mississippi River on some the flattest terrain in the nation. But the movie shows landscapes, especially along the creek where the bodies were found, that are far steeper and hillier than exists in or around West Memphis.
Pam and her husband Terry drive up to the dead end road where all the first responders are gathered, to find out the news that they have found the dead bodies of the 3 missing boys.
There are 2 actors walking right behind Pam (Reese Witherspoon) as she is walking up the police, then standing right behind her when she hears the news. Upon hearing the news that her son's body was found, Pam faints and the man and women standing behind her catch her and help her to the ground.
But a split second before Pam falls to the ground, the male actor on the left braces for her fall and puts his hand on Pam's (Reese's) back to help her, before she actually falls.