The song "Shattered Dreams" by Johnny Hates Jazz accompanies the scene where the Hathaways first notice their son Clay missing. However, the flashback takes place in May 1987, and "Shattered Dreams" was not released in the U.S. until 1988, when it peaked at #2 on the Hot 100 that May. But the song was released in the U.K. in March 1987, two months before Clay's murder.
As part of his alibi, Grabowski claimed that he would sometimes hold on to packages and deliver them on his day off. (In this case on a Sunday) In reality, he could have faced Federal charges, theft of packages and services, if he had ever been caught doing it.
May 1987 scene has Lies by Fleetwood Mac playing, which was not released until August.
Precious Pain by Melissa Etheridge heard in a 1987 scene, which was not released until 1988.