I'll preface this by saying I don't like this guy- he's a lazy bastard. I'm trying not to let this cloud my judgement though.
We have a contractor who I suspect is coming to work under the influence. He's frequently late, sometimes looks absolutely terrible, disappears multiple times during the day. I brought this up with his boss and he agreed to give him his notice to leave. So, he's leaving end of September/beginning of October anyway.
During the course of this conversation with his boss, he made just an off-handed comment "I think he's a drinker".
I didn't think anything of it until I heard him wretching/throwing up in the bathroom on Friday. Now I'm adding 2 + 2 and coming up with 5.
We've got a zero tolerance drug and alcohol policy, and this contractor is going to be responsible for a huge high risk operation in a few days time. If something goes wrong / he hasn't planned it properly due to being under the influence, this could end in fatalities.
What do I do?
YABU - he's leaving anyway. double check his plan for the high risk activity and let him get on with it.
YANBU - this is too dangerous to ignore. report.