My CHL instructor told us that the best way to respond to the on scene officer is to say "I was defending myself. I wish to fully cooperate and I will answer all of your questions, but I would like my attorney present when I do." He said that sometimes officers will continue to poke and prod while trying to buddy up to you in an attempt to get you to say something or slip and say the wrong thing, but that we should always respond with the exact same thing.