Didi margarito use steroids?

I think he did, no man can take the multitude of power puncher from a super fighter like cotto and not get dazed even a little bit, I am not a mexican or a puerto rican so do not answer this with a racist comment, Cotto was the best fighter in that ring and i believe he deserves a rematch, a fair one this time, margaritos body looks weak no way he can be that strong naturally.