|Miller - Floodmoor Basin||Cash, Epic Pistol||24|
Once you've arrived in Floodmoor Basin and dropped down to where the Catch-a-Ride Station is, you'll see someone get run over. You can now interact with their body and begin the Side Mission.
Kill Bloodflap's Gang
After you've accepted this Side Mission, head down to the first waypoint on the map to find one of Bloodflap's Gang's Technicals exiting a garage. Chase after it and take it out.
Once the Technical has been destroyed another waypoint will appear, head over to it and take out the second Technical.
Now both of Bloodflap's Technicals have been taken out, make your way up to the third waypoint and wait for the Inquisitor Bloodflap to spawn. Race after him and take him out.
Talk to Miller
With Bloodflap slain and his gang no more, head back to Miller to complete the Mission.