Business & Human Rights Resource Centre invited RWE to respond.  The response is available in German here.

This is an unofficial translation of the response by the Business & Human Rights Resource Centre:

"We received the letter from the attorney representing Mr. Saul Luciano of Huaraz (Peru).  As with all legal issues, we have begun to evaluate the claims set forth in the letter.  We will release a statement addressing the contents at a later date."