I started listening to this song again and i just realized the guitar riff around 1:14 is sampled from the song "Passage to Bangkok" by Rush
The convicts were a respawning boss that have their own theme that only plays when you are near them. You would step into the malls park area and most of the time that would be the first thing you hear.
You have very limited resources and very little ammo to fight anything riding on a jeep that has a military grade cannon on top. Imagine if the hub area in a Souls game had a giant dragon that flies around it.
If you played the game inside out (like I did), you can cheese them by making them get stuck on a tree, where you can now proceed to shoot them like fish in a barrel using revolvers farmed from the zombie cops.