If you smell jurno, then you need your nasal passages tested. As for Malt, it makes me vomit...mind you, so does the coffee machine.
The suggestion is not that this ATCO turned up drunk, me thinks you have confused the offence that is applicable....
An offence may have been committed, it may not, we will never know, because whether he did commit it or not, it cannot be proved before a court. He is therefore innocent.
You ask why management wont ask the question about why he felt the need to have a drink pre 7am, well perhaps he didn't as with drink drive in the early morning, its usualy the result of the night befores drinking. Far from being a crime of circumstance this requires a positive act, ie drinking.
Being drunk and being unfit are two different offences.....obviously you would be unfit if you are drunk, but you arn't always drunk if you are unfit.