One of the news microphones has a call sign starting with a K. Aside from KDKA and stations in Louisiana and Mississippi, no stations east of the Mississippi River use call signs that start with the letter K.
At the convenience store crime scene there are bags of bread and buns with the brand name Market Pantry. This is the store brand of Target stores.
The team presents a profile of the killer as having an "extreme form of borderline personality disorder," which Reid defines as the "borderline between anxiety and psychosis." This description came into common usage in 1938, and continued through the 1960s and 1970s, but had fallen out of use by the time the DSM-III was published in 1980.