Yes, it sounds like a one-off incident (that is to say, ONE perpetrator and ONE victim), as opposed to the Post Falls scandal, which sounds like more of a plague of corruption/sodomy spreading among the boys there.
And if the lone accused is no longer part of the parish, why make a big public deal out of it?
Advertising a scandal like this isn't good for a parish, you realize. Unless the common good requires it, there is no reason to air dirty laundry in public. I'd say this is a great example of a case where you DON'T need to make it public.
Scandals are eaten up by worldly people for some reason -- entire magazines make their living off the public's appetite for gossip and dirty laundry.
But Catholics look at scandals differently. For example, say you know about a priest who left the priesthood. It's a fact, publicly verifiable with evidence and everything.
Such a scandal is like a pile of dung. When you encounter a pile of dung, you can do two things: avoid it, or step in it. It's not pleasant, so why parade it around, step on it, and smear it all over yourself? What good is accomplished by doing this? Few people will be edified by it, and no one will be protected by smearing the dung all over the place. So just leave it be. There is no harm in avoiding said pile of dung.
When it comes to scandals, the ONLY considerations for a Catholic is:
A) Is it true
B) Is it important for people to know -- does the public good REQUIRE it (is it necessary)
The following are considerations for worldlings but NOT for Catholics:
C) Is it interesting or titillating
D) Does it make me feel better about myself
E) Does it tweak my curiosity
F) Does it get me out the "funk" that is my own boring, dissatisfying life?
G) Does it provide a psychologically "healthy" escape/distraction from the problems in my own life?
Think about those points. Think of the average person who actually reads gossip magazines, and ask yourself if A and B really apply. Of course they don't. It's usually lies, and it certainly doesn't help the public good to know the sordid details of this or that failed celebrity relationship.
People buy those gossip magazines for reasons C) through G).