Can sinners be forgiven?
Only if they repent. There is no forgiveness for unrepentant, willful sins
Also, sinners like Law should be removed from their position.
Has he shown contrition for his sins?
He didn't stay around long enough to ask the raped children for their forgivness.
Yes, but only God can forgive sin, man cannot, nor do you need a mere man nor a group to accomplish this.
You approach the throne of grace with boldness to seek mercy and receive grace through the obedience of Jesus Christ by the Holy Sprit and none other!
Neither do you need nor would it be helpful nor possible to ask anyone else(already in heaven)to intercede with Christ in your behalf!
Of course sinners can be forgiven but they have to truly repent: "Go and sin no more". Wish I knew how a cardinal could be defrocked. They should give him a job cleaning floors with a toothbrush in a monastery so he could learn humility...Or better yet a servant in a home for abused children so he could directly look into the eyes of devastation.
Of course he can be forgiven, but that doesn't undo his behavior, which impacts his credibility - that is, his credibility has been harmed and he should not be in a leadership position.