To say no to accompanying friend/colleague to disciplinary hearing?

[Meeeep]

Friend and colleague has asked me to accompany to a disciplinary. He is very much of the opinion he is not in the wrong (lateness, sickness, hangovers) where as I actually think he has been very much in the wrong.

He has requested me to attend and participate (speak on his behalf at the beginning and end) but I don't really feel comfortable doing it knowing I disagree. Aibu? If not how do I explain to him without offending him?

If he has made up his mind already then it will be unfair. Unfortunately with under 2 years employment he can be dismissed with no recourse.
Your friend needs to follow your advice and keep his fingers crossed.

I think he's not in a place to hear it just now. I do worry this will impact on the friendship but tbh roles revered I would rather have a friend who is honest than someone who will lead me to believe (falsely) that they think everything will be fine.

Yes it will be unfair but I'm guessing this purely on the fact his boss will assume the minimisation route. I hope that if he holds his hands up his boss may have second thoughts and allow another chance. Then if he fucks up again he really can only blame himself.

It's very difficult, we are a small, close and fairly friendly office and things like this really do create atmosphere for everyone. I'm annoyed that even after a verbal warning he messed up a further 3 times last week despite me having a chat with him at the time.

It's like banging your head against a brick wall sometimes!