We shot up your car because you were in it, we feared you would leave too soon as we had been searching around Angel Pine and Los Santos for quite some time already.
You were an imminent threat to me starting from the Boobie Bungalow incident occurred until the time of your death. You admitted to aiming a loaded gun at me when I was trying to get rid of your friends, an eyewitness (Denis Davydenko or Montag) warned me that you were in fact behind me and pointing a loaded handgun at me when I was doing so. You were unmasked, I clearly saw your face.
Keep in mind, I still have the use of my other arm.
Like Sacred said, the streamable's audio proves there was no VC communication. We simply followed Sacred's binds when he did them. The other two in the SUV were just trying to get away it seems like, we do not know.