A tribe came into Tucson one day - more a gang, really. Dirty Dave and his six brothers. They were looking for bullets, and I sold some to them.”— Raul Tejada
Dirty Dave was a leader of a tribal raiding gang.
Raul Tejada sold them ammunition, hoping they would leave now that they had what they wanted, instead they decided they wanted the brothel. They attacked it, killing most of them and taking Claudia, a local prostitute, as a prisoner. Raul gave chase, and after a three day pursuit across the wasteland, Raul found them. Youth was not on his side anymore, however, and the battle left him severely injured. By the time he found Claudia, she was already dead with a bullet in each eye.
Dirty Dave is only mentioned in Fallout: New Vegas.