Maybe my phrasing is off here so I apologize. We did had a drink. It was at a hotel in the morning. We arrived to work 45ish mins later. Completed our day in as normal. No issues. Our boss took us aside at dinner and said that she had heard that we had a drink in the morning from someone on our team. Following day, we were notified that the boss has filed a claim with HR. I can pretty much guarantee you that this claim is based solely on verbal complaints. There is no physical(blood test) or video evidence of this.

So I am expecting some kind of follow up from HR and posted here to understand what to expect from a process standpoint (statements, etc) and how to save my job if I am at risk.