After Lilly talks to Gwen in the back of the patrol car, she opens the door and leaves. The back doors of police cars always have the child safety lock enabled, so someone should have had to open it from the outside.
In a May (or earlier) 1983 scene, the song Hold Me Now by the Thompson Twins is heard, which was not released until November.
At about 28 minutes in, when Rush and Stillman are speaking to Deamer's ex-wife, a boom pole is visible in the upper left as they walk down the street.
When Lilly Rush asks Louie Amante what the oldest crime scene at which evidence was recovered from was, he replies: "Lucy, 6,000 years old, had her head smashed in." 'Lucy' is in fact around 3.2 million years old.