I'm a hotelier, occasionally the cops come asking for guest information, data privacy laws prevent me from providing it, you're suggesting that all German hotels/guest houses etc. shall provide such illegal information and that it is a taxable offence to take a holiday in Germany?
Phileas,
To me it sounds like you're doubting whether the police will be able to find German based pilots or not? Did I get that right?
Remember in the original news article, Ryanair said they are compelled to assist the German investigators in their investigation. If they're true to their word, it shouldn't be too hard to find them.