Spoilers>
I knocked out that tiefling that was going to shoot the goblin in the cage because I failed a check and she attacked. She appeared on top of the gate and was angry at me but forgave me after giving her 1gp. It is the only way I managed to prevent her getting killed near the goblin camp.
Really? That's interesting because when I tried to knock out that lady she turned hostile every time I went anywhere near her (subsequently turning the whole camp hostile as well)