I hate what that man has done, but having been a non-christian myself, and having done things i regret and am ashamed of (nothing to that caliber in societies eyes, but just as bad in God's), all I can say is people do change, and can change. God is a powerful thing, the Holy Spirit works in ways we can never even begin to imagine. We ordain liars, we ordain adulterers, we ordain all sorts of sinners, so why not one who has repented? It's hard, because we are human and full of fear and apprehension, to look past a person's crimes and see that they want to change. The hardest part is being let down so many other times by people like him who say they have repented and who fall back into their sins, to keep on hoping, and keep on having faith that this person could change and won't be like the rest who sinned again.
We have to remember forgiveness the same way God does. He never puts a limit on how many times He'll forgive you, as long as you are trying and repent. I've done the same sin over and over and over and over again, but through practice, I have been able to keep from that sin 99.9 percent of the time. God forgave me, and if I mess up, and try harder, he'll forgive me again. He doesn't even remember those other times because he forgave me.
People do horrible, disgusting, revolting things...but people also do miraculous, amazing, and completely mind-boggling things, too. If this man changed, then why not let him do what the Holy Spirit is guiding him to do. If he hasn't, and he abuses someone again...then God will give him justice.