What does the catholic church do about corrupt leaders?

The Old Testament in the Holy Bible gives the death penalty to sex offenders so if part of the Catholic church didn't even call the police and and have such corruption ended, then they were not following The Bible. It was death penalty through the legal system, never vigilante.

Another perspective : This is a tricky question to answer - on the one hand it could be corrupt leaders outside the church or it can be leaders inside the church. In cases involving the leaders of the church, there is a tendency to cover up the matter - in effect do nothing. In cases of leaders outside the church, the church will assist with advice and in in bad cases even possible protests and sermons against such leaders / corruption.