The fact that the police have not filed charges and are not investigating does not mean that a crime did not happen. In order for the police to get involved a complaint has to be filed. In other words, someone has to press charges.
In light of what has happened recently to women that have filed charges against a football player for sexual assault, if an alleged sexual assault involving an athlete did occur the victim might not be willing to step forward publicly. Even though victims names are generally not published in the newspapers, recent history has shown us that the name will appear on the internet within days. It is not uncommon for alleged victims to end up being harassed and having to leave school.
Therefore, if a crime of this nature were committed and it involved students at the University of Florida, the alleged victim may choose not to press criminal charges and instead take the case to the student conduct committee. Sexual assault is a violation of the student conduct code as referenced in section 4.041 subsection 4(b).
http://regulations.ufl.edu/wp-content/uploads/2012/09/4041.pdf
This course of action would offer a very important advantage to the alleged victim.
The records would not be public and would not be subject to public records requests. In addition, school officials (including coaches) would not be able to comment on the case in any way form or fashion. If for instance, a football player were to be accused of a crime and brought before the student conduct committee, Coach McElwain would not be allowed to say anything other than the player is not practicing and no comment. This privacy would greatly increase the chances of an alleged victim remaining anonymous to the public and therefore free from harassment.
When a student is brought before the student conduct committee the Dean of Students must determine if the accused should be suspended and barred from campus during the investigation and hearings. According to the student conduct code section 6C1-4.044 subsection (1), a student would be suspended if they are deemed to pose a serious physical threat to himself or others or if a suspension is necessary to protect the health, safety, welfare or property of a student or members of the public.
http://regulations.ufl.edu/wp-content/uploads/2012/09/4044.pdf
If a student were accused of a serious offense that could result in expulsion then they would be wise to retain an attorney to represent them during the proceedings.
All we know is that no charges have been filed, no school officials are commenting, the players are still enrolled but not on campus, Callaway has an attorney and that attorney has told us that Callaway has been brought before the student conduct committee.
Given this information it seems likely that the two players were not suspended by McElwain, they were suspended by the Dean of Students. The Dean would not suspend them for grades, failed drug tests or breaking team rules. A suspension would only happen if they were seen as a threat to the welfare or physical safety of a student, students or the general public. I think they have been accused of something very serious.