"Think more deeply and comprehensively.
Here's a very likely and logical pathway to how confession could be corrupted and destroyed...[one of the goals of the devil is corruption of the means of grace]
"Father, this is Tommy Anderson....I am pretty sure that my brother sexually abused a child, I'm morally confused..what should I do".
First it's first person. Then it's second person. Then it's second person but a lie to get back at his brother or friend or former wife..."
The priest could say: "Let's go together to a police station and I will support you while you report this issue." The police will investigate and if the report was a lie then police could charge the accuser for making a false report. In this way, the priest would follow a moral path instead of trying to protect pedophiles, pedophile priests, the Pontifical Secret, and enabling Bishops and Cardinals. 
I am surprised that many conservative Catholics around here do not think deeply and comprehensively.