The authority rejected all allegations. - did anyone expect anything else? Nowadays, investigations don't happen when allegations come in anymore. Instead, you deny everything first. That way the press gets a chance to blow the whole thing up properly. Then you can quickly find a few scapegoats to let take the fall. So the citizen can forget about it all quickly and the summer news void is filled. Or something like that.
At tagesschau im Internet there's the original article.