Space Mafia

From the introduction:

The war between Galaxy Command and the relentless forces of the WARSTAR Empire may be the universe’s biggest conflict, but its far from the only one. And as Galaxy Command’s famous Galactic Marshals and other heroes are occupied by the conflict, forms of crime long thought eradicated flourish. An entire shadow economy, one based around murder-for-hire, weapons smuggling, trade in xeno-slaves and exotic chems, blockade running and high piracy, has emerged from the shadows.