I haven't gone back to find his statement but if he just claimed to be unsuccessful, what makes you think he is Germany? He could have been unsuccessful as a killer. If he is Germany and his goal is to either save someone or block the night kill, why would he have been unsuccessful? No one was killed the first night. I'm not saying he is a baddie but I'm not convinced that he is Germany either.
EDIT: I found the quote. I'm not convinced.