I give you a hint. His domain is German, but he is in the USA. To be able to do so, he needs an Admin in Germany responsible to receive any complaints and legal actions. http://denic.de/domainbedingungen.html Read §3. Don't have the time to translate, I used google: "If the domain holder is not domiciled in Germany, he appoints a Germany-based administrative contact shall also be the person authorized by § 184 of the Zivilpro-zessordnung, § 132 of the Code of Criminal Procedure, § 56, paragraph 3 of the Administrative Procedure Code and § 15 of the administrative procedure Act and the relevant provisions of the Administrative procedure law of the countries."

I doubt he has one, and our laws are very strict about scamming. The keyword here is "Abmahung", which can become very expensive ..