I'd say to mind your own business?
The student may have appealed the decision or his/her case may have changed. In any case, federal laws often prohibit universities from disclosing information in other student's records (both academic and disciplinary) which you or other students who have not been given permission by the person in question should have no business inquiring about anyway.
In any case, from what you've described it sounds like normal procedure at the university is to place students on probation and that suspension is usually a punishment stage that occurs after progressively harsher earlier stages of probation generally after repeat offenses. It may be that in this case, the university determined that no matter how "clear" the evidence was, normal procedures must be followed and the student was merely on probation. Or maybe the Dean of Judicial Affairs spoke too hastily. Or maybe evidence wasn't as "clear" as it appeared. I am uneasy at the prospect that students, without access to the details of the case, are making judgment calls on what the appropriate level of severity of the punishment should be and are potentially considering harassing another student through bureaucratic mechanisms for the perceived failure of the university to meet those expectations.