[quote name='ChesapeakeTV']I can't give you any specifics, unfortunately, but I can definitely tell you it was [I]not[/I] a custom NBC piece...[/QUOTE]
I worked at an NBC affiliate back during this period and never heard that much of the theme in the clear. @Ntropolis in your first clip, I hear a custom NBC logo built into the end under the anchor. Perhaps the composer added that for NBC to use it.
I have a guess over the composer/company and two reasons why I believe it. I bet it's a Craig Palmer (Tuesday Prod/Network Music) theme. Why? (1) The station used two packages from Tuesday during the mid 80's through the mid 90's. The open and close to the newscast @ChesapeakeTV linked to uses News 88... (2) the two bumpers don't appear to be from News 88, but are similar in that they use a triangle instrument loop in the background. That sound is featured in a lot of Tuesday's work.
Anyhoooo, I think it was a great pensive, haunting, dramatic cut that prepared the viewer for a rough and tumble, crime-filled newscast to follow and not so pleasant dreams! :D