In the episode entitled "Civil War", the song "Pictures of Matchstick Men" by Quo Status was played as a background song in some of the final scenes.
Here all the songs from the most recent episode...
Got it Bad by The Broken West
Sentimental by Onoli
60 Revolutions by Gogol Bordello
Monkey by Low
Together by Khromozomes
The song where Crews gets shot is not posted because I don't know it,...