Cardinal Law was "popular" among Catholics. So were many of the priests who abused countless young men.
Either the accusations outlined in the two articles are true, or they're not. If they're not, then Groeschel should come out and deny them. If he didn't tell a young sexual abuse victim who came to him for help to "stop persecuting a good man," he should deny it.
If they are true, Groeschel should say he's sorry for participating in one of the most shameful episodes in the history of the Catholic Church.
That's all he needs to do.