Germans seem to be evolving quickly.
pic.twitter.com/N2cbDvSCE4
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
The nature of this kind of information fiddling makes it very difficult to prove -- that's the point. Now I don't know whether they did anything about these pictures or not, but it looks pretty suspicious. As you say, an alternative and plausible account can be given.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.