A couple of years ago I worked with a guy in his 50s who was going through a bad patch with his wife...... well I say a bad patch, he’d cheated on her for a second time (after 10-15 years) with the same woman.
He came into work one day really struggling to walk and apparently she’d stamped down on his Achilles tendon and then kicked him in the ribs while he was down (IMO a reasonably fair punishment).
As the days went on he got steadily worse on his feet and a couple of us had a sneaky feeling he was drunk. One day he came in and was REALLY bad but shortly after he got into the office he disappeared. A couple of women from another department came to see us and said they’d seen him staggering in the direction of the off-site car park so I grabbed one of my colleagues (the bloke in question was bigger than me) and we set off after him.
We found his car (a T5 Volvo very badly parked across 2 bays) but no sign of him, he then came swinging round the stair case and slurred “Alright you two, what are you doing here?”, I asked him where he was going and he said “home ‘cos I don’t feel well” so I said “Sorry fella, you’re not going anywhere, you’re not driving in your condition”, he protested a little bit then my mate said “You’re going to have to get past two of us fella, it ain’t gunna happen”.
We walked him out of the car park, he wreaked of booze and then started sobbing saying how cr4p his life was etc. At this point we called our manager (who had been in a meeting) who met us and took him to the medical centre where they found a half empty bottle of Vodka.
His wife picked him up and security moved his car to the onsite car park. We had to give statements to HR but being sympathetic (as I had also just split with my wife so had a little empathy for his situation) said that he gave the impression that he *could* have been under the influence but I’m not trained to make that judgement.
In hindsight I wish I hadn’t bothered trying to help him as he came into work 2 days later, moaning that security had damaged his car when moving it and that he’s had a “mini-stroke” which was backed up by a rather dubious doctors note, written by the consultant that his wife was a PA for and who was retiring in a matter of days.
Then to add further insult to injury, he was caught DD a few weeks later..... the excuse being, the clutch went in his car and it was the last straw so he hit the bottle while waiting for the AA..... SERIOUSLY!!!!
I have no tolerance for drink drivers, if I’m drinking I don’t drive and I’d shop my own Dad if I believed he was going to drive under the influence (although having said that, he physically wouldn’t get to his car to be able to drive it

)