I said no, for none of the reasons listed.
Because I don't "know" whether he's changed, or what the exact details were.
No, This incident doesn't disqualify him, not in my book.
What would disqualify him is his attitude towards the incident today, the possible psychological effects of zero punishment, whether this is typical, whether this type of behavior or attitude continued and whether it still continues, these are the factors I'd look at.
Even then, I wouldn't say it would disqualify him from running, but it would definitely make it easier to vote.