Confession,
Thanks for keeping young people safe from a molester.
Possibly a better course would be to use the legal/judicial system to assure that the step to protect young ones is a permanent one at least the individual would be "marked" by being on a sex offender list and likely would spend a good deal of time in jail and in counseling.
The reasons I think an apology is necessary for disfellowshipping is that a judicial committee is not sanctioned or even identified by any scriptural teaching. Rather when a disfellowshipping occurred the early Church/Congregation heard the evidence and made a decision. This accomplished much in that the Congregation was warned by hearing the evidence, the "sinner" had his/her day to present a defense and if the Congregation needed protecting it was a collective decision.
When as elders we DF people for any sin, we are acting a judge with out training, we are involved in a process that is not sanctioned in scripture (judicial committe), we are forcing a set of consequences on the DF'd person that are for the most part man made.
In cases were the physical well being of the Congregation is in danger, a legal solution is best rather than a JC.
Zarco