Here's a list of some of the music score composers, who've composed and conducted scores for TV cop/detective shows:

1. Mike Post & Pete Carpenter
2. Mark Snow
3. Stu Phillips
4. Alan Silvestri
5. Jack Elliott & Allyn Ferguson

Now, of these five that I've just listed, which one do you like the best? If there is a composer-conductor not on the list, vote other, then post his/her name in your posting.