This is Nelson. The sweet woman that took his picture graciously responded to my email quiery. This is what she had to say:
Well Penny I will tell you the story behind this image. I was working for an Instameet in Santiago de Chile (my residence actually) and I found this man around, I stopped him and ask for a Portrait, he was so sweet and he said yes, after the portrait I asked if he can tell me something about him, about his life and this good man told me he just work to raise money for his pets. His mission in this life is to take care of abandoned dogs, so every single peso he rise is for taking care his pets. He´s a homeless and his name is Nelson.
Thank you Vero, for your response and your amazing photo!