Searching for fic where cops/agents on their way to arrest Don

[aleo-70.livejournal.com]

This was a dark fic, I thought I read it on fanfiction.net but I can't seem to find it any more.

It is short and revolves around a child abuse case.  The offender was caught after much work by the team and Charlie.  The story picks up after this point.  The offender is put before the court but walks on a technicality.  It is all too much for Don, feeling for the victims he follows the man home and kills him.  He then goes to Charlie's house where his brother finds him waiting on the front porch.  Charlie learns what Don has done as the sirens close in and knows that the offender has taken a final victim.

I've been hunting for a while now and hopefully someone out there can help as I would love to read it again.

Cheers
ALEO

EDIT - this has been found with your excellent help.