Unfortunately, this is a recurring theme in aviation. I would estimate that perhaps half of these incidents never make the headlines. Over the years I've seen deals quietly cut that allow the accused to retire or go on long term leave for treatment. Sometimes the test results are torn up or invalidated to avoid paperwork outside the company.
Even showing up to check your mail after drinking will get you in big trouble these days as FedEx Chief Pilot Jack Lewis wrote in a recent memo:
...We have another Captain crew member who showed up drunk in the crew lounge recently after deadheading in for a trip. He wasn't checking in for 7 hours and was only transiting the crew lounge, getting his Jepps to prepare to fly later. Security nabbed him and we are all wear[ing] the label. Dumb move.