That does not look like a Redgrave skin to me. If you search the Second Life marketplace you can find many skin templates for sale, granted anything that looks high quality is stolen, but Linden Labs don't care as they get their cut and leave them selling so are party to theft in my opinion.
I digress, point is if somone buys a template in good faith on the Second Life Marketplace and then uploads it to their OpenSim I don't see how they are to blame or why they should remove such content or why OpenSim Grid owners should do policing for Linden Labs...
If that is a Redgrave Skin maybe it was bought on Second Life or InWorldz and the buyer does not believe in purchasing the same item again and again.
Does Brasil recognise DMCA anyway? I know we don't in Europe.