Hello!
Firstly I found nothing at all about this in German media and secondly one does not get "thrown into jail" here for showing up drunk for work. Not even as a pilot. Police will breathalyse him and if their instrument shows elevated alcohol levels they will drive him to a hospital where a blood sample is taken and analysed. If there is evidence of elevated blood alcohol content, his license will be confiscated and the case forwarded to the prosecutor.