With respect to what might happen on the University level, I took a look at the Student Code of Conduct. Looks like he pretty clearly and in multiple ways violated the Alcohol, Disorderly Behavior and Physical Abuse provisions. Pending legal process, he may also be in violation of the Laws and Statutes provision. Importantly the Laws and Statutes provision requires "violation" not conviction so if he took diversion or some other "second chance" plea which required an admission of guilt or stipulation to the facts but did not result in conviction I think it is still a violation of the CoC. All violations are cumulative and students are responsible for all aspects of the CoC on and off campus.
The link to the part of the handbook that describes the process for hearing and discipline is broken but if I recall correctly from the last time we went through this (ugh!) the burden of proof is "more likely than not" or something comparable.
https://udayton.edu/policies/_resour...20Handbook.pdf